{
  "revision": "shanghai-audition-collection-03",
  "purpose": "Eighteen separate listening candidates: all ten earlier MP3s preserved, plus five Chinese/modern romantic and dreamy instrumentals and three original Shanghai songs. No scene installation.",
  "created_utc": "2026-10-06T04:37:07.762448+00:00",
  "model_selection": "MiniMax Music 2.5, explicitly selected by user; authorization retained",
  "generated_with": "MiniMax Music 2.5 through MuleRouter CLI / MuleRun gateway",
  "installed_audio_changed": false,
  "processing": "Preserved opening or 1-second offset for long output, excerpt up to 57 seconds, 0.45-second fade-in, 2.5-second fade-out, two-pass EBU R128 normalization to -18 LUFS / -2 dBTP target, stereo 44.1 kHz 160 kbps MP3. No ambient-noise mix, added instruments or looping crossfade.",
  "verification": "All MP3s decoded as finite, non-silent stereo without clipping; duration, loudness, true peak and SHA-256 verified. All prior audition and installed MP3 hashes remain exact. No claim of listening approval, verified instrumentation, vocal absence, pronunciation or lyric adherence.",
  "assets": [
    {
      "world": "today",
      "scene": "Today",
      "title": "Sunlit Steps",
      "file": "audition-today-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "afb450fe-c952-442a-9880-1d7db766129b",
      "requested_at": "2026-10-06T04:34:11.044042+00:00",
      "prompt": "Create an original fully instrumental cue around 55 seconds long, a calm but upbeat feel-good soundtrack for a leisurely Shanghai waterfront walk. An inviting, memorable melody over a light relaxed rhythmic groove. Cheerful and quietly optimistic, never sleepy or melancholy. A clear balanced studio mix with articulate midrange instruments and modest bass, comfortable dynamics; no heavy sub bass. Start the main musical idea within two seconds; develop it in two concise repeating phrases and finish with a gentle musical resolution. Only musical instruments: absolutely no singing, lyrics, humming, choir, vocal samples, spoken words, vocal chops or voice-like synthesizers. No traffic, water, birds, field recordings, vinyl hiss or environmental sound effects. No droning pads, long introduction, dramatic rise, aggressive drums or EDM drop. SUNLIT STEPS: sunny acoustic pop with a soft bossa-inspired sway, 94 BPM in 4/4, D major. A bright nylon-string guitar carries a friendly rising four-note hook; crisp soft acoustic strums, warm piano responses, light upright bass and a delicate shaker with brushed side-stick. Natural open-air warmth, relaxed smiles and unhurried forward movement. Keep the guitar lead and light groove easy to hear. No bells, celesta, saxophone or synth lead.",
      "lyrics_prompt": "[Intro]\n[Instrumental]\n[Theme]\n[Instrumental]\n[Variation]\n[Instrumental]\n[Outro]\n[Instrumental]",
      "lyrics_optimizer": false,
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      "loudness": {
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        "range_lu": 4.7,
        "target_lufs": -18,
        "target_true_peak_dbtp": -2
      }
    },
    {
      "world": "bloom",
      "scene": "Cherry Blossom",
      "title": "Petal Parade",
      "file": "audition-bloom-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "3895f3cf-2d1f-4c5b-81b9-0251853a5e13",
      "requested_at": "2026-10-06T04:34:11.044404+00:00",
      "prompt": "Create an original fully instrumental cue around 55 seconds long, a calm but upbeat feel-good soundtrack for a leisurely Shanghai waterfront walk. An inviting, memorable melody over a light relaxed rhythmic groove. Cheerful and quietly optimistic, never sleepy or melancholy. A clear balanced studio mix with articulate midrange instruments and modest bass, comfortable dynamics; no heavy sub bass. Start the main musical idea within two seconds; develop it in two concise repeating phrases and finish with a gentle musical resolution. Only musical instruments: absolutely no singing, lyrics, humming, choir, vocal samples, spoken words, vocal chops or voice-like synthesizers. No traffic, water, birds, field recordings, vinyl hiss or environmental sound effects. No droning pads, long introduction, dramatic rise, aggressive drums or EDM drop. PETAL PARADE: airy playful chamber-pop, 104 BPM in gently bouncing 6/8, F major. Rounded wooden marimba plays a catchy skipping melody, sparkling celesta answers, flowing harp, soft pizzicato strings and tiny hand percussion. Light, joyful and graceful like petals floating through warm spring air. Clear rhythmic lift while still calm enough for conversation. Use short melodic phrases and space, not a busy cascade. No guitar, electric piano, brass or heavy bass.",
      "lyrics_prompt": "[Intro]\n[Instrumental]\n[Theme]\n[Instrumental]\n[Variation]\n[Instrumental]\n[Outro]\n[Instrumental]",
      "lyrics_optimizer": false,
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        "target_true_peak_dbtp": -2
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    },
    {
      "world": "autumn",
      "scene": "Autumn",
      "title": "Golden Afternoon",
      "file": "audition-autumn-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "bbfbb9b4-8223-4e07-a139-6935f3178e49",
      "requested_at": "2026-10-06T04:34:11.044428+00:00",
      "prompt": "Create an original fully instrumental cue around 55 seconds long, a calm but upbeat feel-good soundtrack for a leisurely Shanghai waterfront walk. An inviting, memorable melody over a light relaxed rhythmic groove. Cheerful and quietly optimistic, never sleepy or melancholy. A clear balanced studio mix with articulate midrange instruments and modest bass, comfortable dynamics; no heavy sub bass. Start the main musical idea within two seconds; develop it in two concise repeating phrases and finish with a gentle musical resolution. Only musical instruments: absolutely no singing, lyrics, humming, choir, vocal samples, spoken words, vocal chops or voice-like synthesizers. No traffic, water, birds, field recordings, vinyl hiss or environmental sound effects. No droning pads, long introduction, dramatic rise, aggressive drums or EDM drop. GOLDEN AFTERNOON: mellow acoustic jazz with a gentle swinging pulse, 88 BPM in 4/4, G major with warm sixth and ninth chords. A mellow clarinet carries a smiling melodic hook, fingerpicked steel-string guitar answers, upright bass walks lightly, and brushed snare keeps a very soft swing. Cozy golden leaves, warm sunlight and good company. More contented and gently rhythmic than wistful; lyrical and intimate rather than smoky or sad. No celesta, marimba, synthesizer or big band.",
      "lyrics_prompt": "[Intro]\n[Instrumental]\n[Theme]\n[Instrumental]\n[Variation]\n[Instrumental]\n[Outro]\n[Instrumental]",
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    },
    {
      "world": "night",
      "scene": "Night",
      "title": "Afterglow Avenue",
      "file": "audition-night-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "0a321a4f-8526-4043-be4f-ab3fa9220b3f",
      "requested_at": "2026-10-06T04:34:11.044503+00:00",
      "prompt": "Create an original fully instrumental cue around 55 seconds long, a calm but upbeat feel-good soundtrack for a leisurely Shanghai waterfront walk. An inviting, memorable melody over a light relaxed rhythmic groove. Cheerful and quietly optimistic, never sleepy or melancholy. A clear balanced studio mix with articulate midrange instruments and modest bass, comfortable dynamics; no heavy sub bass. Start the main musical idea within two seconds; develop it in two concise repeating phrases and finish with a gentle musical resolution. Only musical instruments: absolutely no singing, lyrics, humming, choir, vocal samples, spoken words, vocal chops or voice-like synthesizers. No traffic, water, birds, field recordings, vinyl hiss or environmental sound effects. No droning pads, long introduction, dramatic rise, aggressive drums or EDM drop. AFTERGLOW AVENUE: elegant relaxed city soul-jazz groove, 92 BPM in 4/4, A major with silky major-seventh and ninth chords. Warm Rhodes electric piano plays a gently syncopated memorable melody, clean muted electric guitar adds short rhythmic answers, a restrained rounded electric bass and brushed snare/soft closed hat form a light pocket. Urban blue hour, warm lights, quiet confidence and an easy smile. Keep harmony luminous, bass modest and drums delicate. No acoustic guitar, marimba, celesta, saxophone, dark drone or cinematic swell.",
      "lyrics_prompt": "[Intro]\n[Instrumental]\n[Theme]\n[Instrumental]\n[Variation]\n[Instrumental]\n[Outro]\n[Instrumental]",
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    {
      "world": "night",
      "scene": "Today · Night",
      "title": "The Bund, in Swing",
      "file": "audition-bund-jazz-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "2fd33de8-2474-4aa8-87d0-81fa11790703",
      "requested_at": "2026-10-06T05:09:30.039357+00:00",
      "prompt": "Create a new original fully instrumental music cue around 60 seconds long for a calm, upbeat, feel-good walk through Shanghai. An immediately memorable melody, light rhythmic movement, inviting warmth and quiet optimism. Establish the tune within two seconds, develop it through two contrasting complete musical phrases, reprise the hook, and finish gracefully. Keep clear natural instrumental timbres, a balanced stereo studio mix, articulate midrange, modest bass, comfortable dynamics and an unhurried human groove. No singing, humming, voice, spoken narration, choir, vocal samples, vocal chops or voice-like synthesizers. No traffic, birds, water, crowd sound, field recordings, vinyl hiss or environmental effects. No heavy drums, dramatic swell, dark drone or EDM drop. Invent all melodies and arrangements; do not quote or imitate any existing song, musician, recording or traditional tune. THE BUND, IN SWING: intimate old-Shanghai-inspired small-ensemble jazz, 96 BPM with a gentle swung 4/4 pulse, B-flat major. Muted trumpet leads a smiling concise melody, clarinet answers gracefully, acoustic piano comps lightly, upright bass walks softly, and brushed snare adds restrained swing. Warm Art Deco salon elegance, lightly dancing and conversational, never brassy or loud. Natural clean recording, not a vintage recording simulation. No Chinese instruments or electronic synths.",
      "lyrics_prompt": "[Intro]\n[Instrumental]\n[Verse]\n[Instrumental]\n[Chorus]\n[Instrumental]\n[Verse]\n[Instrumental]\n[Outro]\n[Instrumental]",
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      "id": "bund-jazz",
      "worlds": [
        "today",
        "night"
      ],
      "styles": [
        "jazz"
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      "style_label": "Small-ensemble swing",
      "description": "Muted trumpet and clarinet trade a friendly tune over piano, upright bass and soft brushes.",
      "source_ids": [
        "peace-jazz",
        "jz-spring"
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      "collection": "shanghai",
      "cultural_limit": "Shanghai-informed original creative brief, not authentic field recording, traditional repertoire or an imitation of an existing artist."
    },
    {
      "world": "today",
      "scene": "Today · Blossom",
      "title": "Morning in the Lilong",
      "file": "audition-lilong-morning-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "9b812e95-69cc-4019-954f-9d4a1641e07d",
      "requested_at": "2026-10-06T05:09:30.113996+00:00",
      "prompt": "Create a new original fully instrumental music cue around 60 seconds long for a calm, upbeat, feel-good walk through Shanghai. An immediately memorable melody, light rhythmic movement, inviting warmth and quiet optimism. Establish the tune within two seconds, develop it through two contrasting complete musical phrases, reprise the hook, and finish gracefully. Keep clear natural instrumental timbres, a balanced stereo studio mix, articulate midrange, modest bass, comfortable dynamics and an unhurried human groove. No singing, humming, voice, spoken narration, choir, vocal samples, vocal chops or voice-like synthesizers. No traffic, birds, water, crowd sound, field recordings, vinyl hiss or environmental effects. No heavy drums, dramatic swell, dark drone or EDM drop. Invent all melodies and arrangements; do not quote or imitate any existing song, musician, recording or traditional tune. MORNING IN THE LILONG: an original contemporary acoustic Chinese-instrument blend, 90 BPM relaxed 4/4, D major with a gentle pentatonic melody. Nylon-string guitar sets a clear buoyant fingerpicked groove; bright pipa plucks answer the melody with short nimble flourishes. Soft upright bass, tiny shaker and sparse warm piano chords. Neighborly, sunlit, fresh and lightly rhythmic. Keep the pipa clearly distinct from guitar, never frantic. This is a modern imagined lane-morning soundtrack, not a reconstruction of local folk repertoire.",
      "lyrics_prompt": "[Intro]\n[Instrumental]\n[Verse]\n[Instrumental]\n[Chorus]\n[Instrumental]\n[Verse]\n[Instrumental]\n[Outro]\n[Instrumental]",
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      "id": "lilong-morning",
      "worlds": [
        "today",
        "bloom"
      ],
      "styles": [
        "acoustic",
        "fusion"
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      "style_label": "Acoustic / pipa blend",
      "description": "Acoustic guitar and bright pipa plucks share an easy morning groove with soft hand percussion.",
      "source_ids": [
        "jiangnan-sizhu"
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      "collection": "shanghai",
      "cultural_limit": "Shanghai-informed original creative brief, not authentic field recording, traditional repertoire or an imitation of an existing artist."
    },
    {
      "world": "bloom",
      "scene": "Blossom · Today",
      "title": "Silk & Bamboo, in Spring",
      "file": "audition-jiangnan-spring-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "8b7a8b38-fb0b-43ad-b778-c2a9642030ac",
      "requested_at": "2026-10-06T05:09:30.298176+00:00",
      "prompt": "Create a new original fully instrumental music cue around 60 seconds long for a calm, upbeat, feel-good walk through Shanghai. An immediately memorable melody, light rhythmic movement, inviting warmth and quiet optimism. Establish the tune within two seconds, develop it through two contrasting complete musical phrases, reprise the hook, and finish gracefully. Keep clear natural instrumental timbres, a balanced stereo studio mix, articulate midrange, modest bass, comfortable dynamics and an unhurried human groove. No singing, humming, voice, spoken narration, choir, vocal samples, vocal chops or voice-like synthesizers. No traffic, birds, water, crowd sound, field recordings, vinyl hiss or environmental effects. No heavy drums, dramatic swell, dark drone or EDM drop. Invent all melodies and arrangements; do not quote or imitate any existing song, musician, recording or traditional tune. SILK AND BAMBOO, IN SPRING: Jiangnan silk-and-bamboo-inspired original chamber music with a subtle modern light-marimba pulse. Airy rounded dizi bamboo flute carries a graceful skipping melody, sparkling yangqin and delicate pipa weave short answering embellishments. Very soft erhu support, lightly bouncing 6/8 at 96 BPM, G major pentatonic colors, cheerful spring air and a relaxed smile. Melodic interplay with space and graceful ornament, not piercing flute, tourist jingle or cinematic fantasy. The marimba supports rather than dominates.",
      "lyrics_prompt": "[Intro]\n[Instrumental]\n[Verse]\n[Instrumental]\n[Chorus]\n[Instrumental]\n[Verse]\n[Instrumental]\n[Outro]\n[Instrumental]",
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      },
      "id": "jiangnan-spring",
      "worlds": [
        "bloom",
        "today"
      ],
      "styles": [
        "fusion"
      ],
      "style_label": "Jiangnan-inspired spring",
      "description": "Dizi and sparkling yangqin weave a light skipping motif with pipa and rounded marimba.",
      "source_ids": [
        "jiangnan-sizhu"
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      "collection": "shanghai",
      "cultural_limit": "Shanghai-informed original creative brief, not authentic field recording, traditional repertoire or an imitation of an existing artist."
    },
    {
      "world": "autumn",
      "scene": "Autumn · Today",
      "title": "Plane-Tree Waltz",
      "file": "audition-plane-tree-waltz-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "c5f7ac9b-eeef-4334-8706-bff6a4c08bb4",
      "requested_at": "2026-10-06T05:10:02.724486+00:00",
      "prompt": "Create a new original fully instrumental music cue around 60 seconds long for a calm, upbeat, feel-good walk through Shanghai. An immediately memorable melody, light rhythmic movement, inviting warmth and quiet optimism. Establish the tune within two seconds, develop it through two contrasting complete musical phrases, reprise the hook, and finish gracefully. Keep clear natural instrumental timbres, a balanced stereo studio mix, articulate midrange, modest bass, comfortable dynamics and an unhurried human groove. No singing, humming, voice, spoken narration, choir, vocal samples, vocal chops or voice-like synthesizers. No traffic, birds, water, crowd sound, field recordings, vinyl hiss or environmental effects. No heavy drums, dramatic swell, dark drone or EDM drop. Invent all melodies and arrangements; do not quote or imitate any existing song, musician, recording or traditional tune. PLANE-TREE WALTZ: an original warm erhu and acoustic jazz waltz in 3/4, 102 BPM, F major with gentle sixth and ninth chords. Erhu leads an optimistic singing instrumental melody with restrained expressive slides; mellow cello gives short lower replies. Fingerpicked acoustic guitar, lightly plucked upright bass and very soft brushed percussion keep a gently swaying three-beat pulse. Golden afternoon leaves, contentment and forward motion, not sadness, lament, epic strings or a slow dramatic ballad.",
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        "target_lufs": -18,
        "target_true_peak_dbtp": -2
      },
      "id": "plane-tree-waltz",
      "worlds": [
        "autumn",
        "today"
      ],
      "styles": [
        "jazz",
        "fusion",
        "acoustic"
      ],
      "style_label": "Warm erhu jazz waltz",
      "description": "A smiling erhu melody, mellow cello and acoustic guitar ride a gentle jazz-waltz pulse.",
      "source_ids": [
        "jiangnan-sizhu",
        "jz-spring"
      ],
      "collection": "shanghai",
      "cultural_limit": "Shanghai-informed original creative brief, not authentic field recording, traditional repertoire or an imitation of an existing artist."
    },
    {
      "world": "night",
      "scene": "Night · Today",
      "title": "Pudong After Hours",
      "file": "audition-pudong-groove-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "d3bfd221-75e6-4d86-9d2d-689b6f195b73",
      "requested_at": "2026-10-06T05:10:03.331233+00:00",
      "prompt": "Create a new original fully instrumental music cue around 60 seconds long for a calm, upbeat, feel-good walk through Shanghai. An immediately memorable melody, light rhythmic movement, inviting warmth and quiet optimism. Establish the tune within two seconds, develop it through two contrasting complete musical phrases, reprise the hook, and finish gracefully. Keep clear natural instrumental timbres, a balanced stereo studio mix, articulate midrange, modest bass, comfortable dynamics and an unhurried human groove. No singing, humming, voice, spoken narration, choir, vocal samples, vocal chops or voice-like synthesizers. No traffic, birds, water, crowd sound, field recordings, vinyl hiss or environmental effects. No heavy drums, dramatic swell, dark drone or EDM drop. Invent all melodies and arrangements; do not quote or imitate any existing song, musician, recording or traditional tune. PUDONG AFTER HOURS: a contemporary Shanghai-inspired soulful downtempo city groove, 88 BPM in 4/4, E major with luminous major-seventh chords. Warm Rhodes electric piano plays a catchy syncopated motif, resonant guqin plucks answer in short spacious phrases, clean muted electric guitar adds understated rhythm, modest rounded bass and soft brushed snare/closed hat keep a relaxed pocket. Polished, optimistic, cosmopolitan blue-hour energy. Guqin is a creative instrumental pairing, not a claim of a traditional Shanghai ensemble. No dark ambient bed or heavy sub bass.",
      "lyrics_prompt": "[Intro]\n[Instrumental]\n[Verse]\n[Instrumental]\n[Chorus]\n[Instrumental]\n[Verse]\n[Instrumental]\n[Outro]\n[Instrumental]",
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      "id": "pudong-groove",
      "worlds": [
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        "today"
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      "styles": [
        "groove",
        "fusion"
      ],
      "style_label": "Rhodes / guqin city groove",
      "description": "Warm Rhodes and resonant guqin plucks meet a restrained modern soul groove.",
      "source_ids": [
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      "collection": "shanghai",
      "cultural_limit": "Shanghai-informed original creative brief, not authentic field recording, traditional repertoire or an imitation of an existing artist."
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    {
      "world": "night",
      "scene": "Night · Autumn",
      "title": "A Letter Across the Huangpu",
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      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "47672b8d-ddf1-41fa-9df7-21f813585580",
      "requested_at": "2026-10-06T05:10:03.856669+00:00",
      "prompt": "Create a new original fully instrumental music cue around 60 seconds long for a calm, upbeat, feel-good walk through Shanghai. An immediately memorable melody, light rhythmic movement, inviting warmth and quiet optimism. Establish the tune within two seconds, develop it through two contrasting complete musical phrases, reprise the hook, and finish gracefully. Keep clear natural instrumental timbres, a balanced stereo studio mix, articulate midrange, modest bass, comfortable dynamics and an unhurried human groove. No singing, humming, voice, spoken narration, choir, vocal samples, vocal chops or voice-like synthesizers. No traffic, birds, water, crowd sound, field recordings, vinyl hiss or environmental effects. No heavy drums, dramatic swell, dark drone or EDM drop. Invent all melodies and arrangements; do not quote or imitate any existing song, musician, recording or traditional tune. A LETTER ACROSS THE HUANGPU: romantic but hopeful piano and erhu chamber-pop, 82 BPM in 4/4, C major with warm add-nine harmony. Acoustic piano introduces a clear memorable upward-reaching melody; erhu answers lyrically in its warm middle register. Delicate acoustic guitar arpeggios, soft plucked bass and a barely-there brushed pulse give relaxed forward motion. An affectionate evening gift, reflected city lights, warmth and optimism. Avoid melancholy, dramatic orchestral crescendos, sentimental vibrato excess or a featureless slow pad.",
      "lyrics_prompt": "[Intro]\n[Instrumental]\n[Verse]\n[Instrumental]\n[Chorus]\n[Instrumental]\n[Verse]\n[Instrumental]\n[Outro]\n[Instrumental]",
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      "id": "huangpu-evening",
      "worlds": [
        "night",
        "autumn"
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      "styles": [
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        "fusion"
      ],
      "style_label": "Piano / erhu river melody",
      "description": "Piano and erhu pass a hopeful melody between them, with a soft acoustic pulse.",
      "source_ids": [
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      "collection": "shanghai",
      "cultural_limit": "Shanghai-informed original creative brief, not authentic field recording, traditional repertoire or an imitation of an existing artist."
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    {
      "world": "today",
      "scene": "Today · Blossom",
      "title": "晴窗丝竹 · Silk & Sunlight",
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      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
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      "requested_at": "2026-10-06T06:16:07.983390+00:00",
      "prompt": "Compose an entirely original instrumental miniature, approximately 52 to 58 seconds, for a Shanghai waterfront world. Begin the memorable main melody within 2 seconds, develop two short phrases, and end with a gentle complete cadence by 55 seconds. Natural, articulate studio sound, clear midrange and restrained bass, expressive dynamics. No vocals, humming, choir, spoken word, vocal chops, environmental sounds, field recordings or artificial vinyl noise. Do not quote any existing tune or imitate a named artist. A classical Chinese Jiangnan silk-and-bamboo inspired acoustic ensemble: supple dizi flute, lyrical erhu, bright pipa and delicate yangqin. 88 BPM, lilting duple pulse. Dizi begins a smiling pentatonic phrase, erhu answers and ornaments it while pipa and yangqin interweave light transparent figures. Serene sun through an open window, warm and quietly uplifting. Small intimate acoustic ensemble, clear individual instruments, no Western rhythm section, no synthesizer, no epic orchestral rise.",
      "lyrics_prompt": "[Instrumental Intro]\n[Instrumental Theme]\n[Instrumental Variation]\n[Instrumental Outro]",
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      "id": "jiangnan-sunlit",
      "worlds": [
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        "bloom"
      ],
      "styles": [
        "chinese",
        "chamber"
      ],
      "style_label": "Jiangnan silk-and-bamboo chamber music",
      "description": "Bright dizi, erhu, pipa and yangqin weave a serene, lightly ornamented original melody.",
      "collection": "dreams-and-songs",
      "kind": "instrumental",
      "moods": [
        "uplifting",
        "serene"
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      "language": "none",
      "lyrics": null,
      "lyrics_authorship": "Instrumental structure tags only; no lyrical text.",
      "verification_limit": "Signal and metadata verified. Instrumentation, singing, pronunciation, lyrical adherence and subjective music quality require human listening.",
      "cultural_limit": "Original creative brief. Chinese instrument references do not certify a traditional performance or arrangement."
    },
    {
      "world": "night",
      "scene": "Night · Autumn",
      "title": "月入江心 · Moon on the River",
      "file": "audition-guqin-moon-dream-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "49543ee9-18ae-409a-bed3-a73cb24d75f9",
      "requested_at": "2026-10-06T06:16:07.984403+00:00",
      "prompt": "Compose an entirely original instrumental miniature, approximately 52 to 58 seconds, for a Shanghai waterfront world. Begin the memorable main melody within 2 seconds, develop two short phrases, and end with a gentle complete cadence by 55 seconds. Natural, articulate studio sound, clear midrange and restrained bass, expressive dynamics. No vocals, humming, choir, spoken word, vocal chops, environmental sounds, field recordings or artificial vinyl noise. Do not quote any existing tune or imitate a named artist. A classical Chinese guqin and xiao duet, dreamlike and unhurried at an implied 66 BPM. Guqin harmonics and warm low plucks sustain naturally; breathy xiao plays a lucid spacious melody with pauses, bends and gentle answers. Tender, peaceful, curious rather than mournful. Very subtle acoustic room resonance, close detail, flowing free phrase rhythm. Keep an actual melody and expressive plucked notes rather than an unchanging drone. No beat, pads, percussion, piano or Western strings.",
      "lyrics_prompt": "[Instrumental Intro]\n[Instrumental Theme]\n[Instrumental Variation]\n[Instrumental Outro]",
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      "original_duration_seconds": 106.672472,
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      "channels": 2,
      "bitrate": 160000,
      "bytes": 1141595,
      "sha256": "f02648b1004934433874811bad5a585a7ee5fa4b4cd018ec758bc339869affd8",
      "original_sha256": "d72be0bece64f0c1d6ef934275ae55a4512c0d5f0ab418670b24d3cb09d855f0",
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      "loudness": {
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        "target_lufs": -18,
        "target_true_peak_dbtp": -2
      },
      "id": "guqin-moon-dream",
      "worlds": [
        "night",
        "autumn"
      ],
      "styles": [
        "chinese",
        "ambient"
      ],
      "style_label": "Guqin / xiao dreamscape",
      "description": "Resonant guqin harmonics and breathy xiao phrases leave space for a quiet moonlit dream.",
      "collection": "dreams-and-songs",
      "kind": "instrumental",
      "moods": [
        "dreamy",
        "serene"
      ],
      "language": "none",
      "lyrics": null,
      "lyrics_authorship": "Instrumental structure tags only; no lyrical text.",
      "verification_limit": "Signal and metadata verified. Instrumentation, singing, pronunciation, lyrical adherence and subjective music quality require human listening.",
      "cultural_limit": "Original creative brief. Chinese instrument references do not certify a traditional performance or arrangement."
    },
    {
      "world": "autumn",
      "scene": "Autumn · Blossom · Night",
      "title": "与你同舟 · Beside You",
      "file": "audition-erhu-romance-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "4724946c-0fe6-4364-9414-7515355e9189",
      "requested_at": "2026-10-06T06:16:07.984686+00:00",
      "prompt": "Compose an entirely original instrumental miniature, approximately 52 to 58 seconds, for a Shanghai waterfront world. Begin the memorable main melody within 2 seconds, develop two short phrases, and end with a gentle complete cadence by 55 seconds. Natural, articulate studio sound, clear midrange and restrained bass, expressive dynamics. No vocals, humming, choir, spoken word, vocal chops, environmental sounds, field recordings or artificial vinyl noise. Do not quote any existing tune or imitate a named artist. Romantic Chinese chamber music, a singing erhu carries a tender hopeful long-arc melody above rippling pipa and restrained low cello. 76 BPM in gentle 3/4, expressive rubato, warm open consonant harmony. Intimate affection, two people strolling beside the Huangpu, gentle joy and closeness rather than heartbreak. Natural bow and pluck detail, erhu melody clearly forward. No drum kit, large orchestra, synthesizer, dramatic crescendo or imitation of a traditional tune.",
      "lyrics_prompt": "[Instrumental Intro]\n[Instrumental Theme]\n[Instrumental Variation]\n[Instrumental Outro]",
      "lyrics_optimizer": false,
      "original_duration_seconds": 102.34195,
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      "sha256": "abc326879513dca1498a3f0ecfb64a809b7a26b20b2508b19cefd3bd6a037fa3",
      "original_sha256": "f7ecf65d4d1e7e34ddf464dd8db391f1e0288c5b1b22147fd0856fe11d943b0b",
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        "range_lu": 12.3,
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      "id": "erhu-romance",
      "worlds": [
        "autumn",
        "bloom",
        "night"
      ],
      "styles": [
        "chinese",
        "chamber"
      ],
      "style_label": "Romantic erhu / pipa chamber duet",
      "description": "A tender erhu melody and rippling pipa, supported by restrained acoustic strings.",
      "collection": "dreams-and-songs",
      "kind": "instrumental",
      "moods": [
        "romantic",
        "serene"
      ],
      "language": "none",
      "lyrics": null,
      "lyrics_authorship": "Instrumental structure tags only; no lyrical text.",
      "verification_limit": "Signal and metadata verified. Instrumentation, singing, pronunciation, lyrical adherence and subjective music quality require human listening.",
      "cultural_limit": "Original creative brief. Chinese instrument references do not certify a traditional performance or arrangement."
    },
    {
      "world": "today",
      "scene": "Today · Night",
      "title": "城市轻轻醒来 · A New Day",
      "file": "audition-city-new-day-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "73ce9ae4-f03a-4913-94d2-3456308f4f60",
      "requested_at": "2026-10-06T06:18:54.633539+00:00",
      "prompt": "Compose an entirely original instrumental miniature, approximately 52 to 58 seconds, for a Shanghai waterfront world. Begin the memorable main melody within 2 seconds, develop two short phrases, and end with a gentle complete cadence by 55 seconds. Natural, articulate studio sound, clear midrange and restrained bass, expressive dynamics. No vocals, humming, choir, spoken word, vocal chops, environmental sounds, field recordings or artificial vinyl noise. Do not quote any existing tune or imitate a named artist. Contemporary uplifting city instrumental, 102 BPM in 4/4. A crisp clean electric guitar plays an immediately catchy syncopated motif, warm Rhodes answers, restrained rounded electric bass, soft kick, rim clicks and articulate closed hi-hat keep a relaxed forward groove. Sunny contemporary soul-pop, quietly confident and smiling. Airy arrangement, changing chords, a strong tuneful lead rather than repeating background pad. Tasteful modern stereo mix, no EDM drop, heavy sub bass or lo-fi distortion.",
      "lyrics_prompt": "[Instrumental Intro]\n[Instrumental Theme]\n[Instrumental Variation]\n[Instrumental Outro]",
      "lyrics_optimizer": false,
      "original_duration_seconds": 58.990295,
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      "sha256": "6353cbbe2195213f8496794c3a7e0992b91ef50120c7552f9996095e7f5e1c73",
      "original_sha256": "47682dcd96b349d30d0e51037df2043fe2ed86a3f4c29553619d768d20f31cd5",
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      },
      "id": "city-new-day",
      "worlds": [
        "today",
        "night"
      ],
      "styles": [
        "groove",
        "modern"
      ],
      "style_label": "Modern warm city groove",
      "description": "Clean guitar, Rhodes and a light pocket make an optimistic, easy-moving city melody.",
      "collection": "dreams-and-songs",
      "kind": "instrumental",
      "moods": [
        "uplifting",
        "serene"
      ],
      "language": "none",
      "lyrics": null,
      "lyrics_authorship": "Instrumental structure tags only; no lyrical text.",
      "verification_limit": "Signal and metadata verified. Instrumentation, singing, pronunciation, lyrical adherence and subjective music quality require human listening.",
      "cultural_limit": "Original creative brief. Chinese instrument references do not certify a traditional performance or arrangement."
    },
    {
      "world": "bloom",
      "scene": "Blossom · Night",
      "title": "梦与你同在 · Dreaming Together",
      "file": "audition-dreaming-together-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "ceb5ed52-82da-49b4-a169-fd343cc97833",
      "requested_at": "2026-10-06T06:18:54.634187+00:00",
      "prompt": "Compose an entirely original instrumental miniature, approximately 52 to 58 seconds, for a Shanghai waterfront world. Begin the memorable main melody within 2 seconds, develop two short phrases, and end with a gentle complete cadence by 55 seconds. Natural, articulate studio sound, clear midrange and restrained bass, expressive dynamics. No vocals, humming, choir, spoken word, vocal chops, environmental sounds, field recordings or artificial vinyl noise. Do not quote any existing tune or imitate a named artist. Dreamy romantic ambient-pop instrumental, 78 BPM in 6/8. Clear intimate felt-piano melody over soft flowing chamber strings, delicate high piano responses, very restrained brushed pulse and warm bass notes. Luminous major-nine harmony with a memorable rising and falling theme, floating but emotionally present. The feeling of sharing a dream city with someone you love. Let piano and string melody be distinct rather than submerged in reverb. No endless drone, huge cinematic swell, vocal-like pad or heavy drums.",
      "lyrics_prompt": "[Instrumental Intro]\n[Instrumental Theme]\n[Instrumental Variation]\n[Instrumental Outro]",
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      "original_duration_seconds": 90.615873,
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      "bytes": 1141595,
      "sha256": "5cace081cc0d042bec1e08a4a8c218acf88bf571e01bbc1b475309d52e476661",
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      "loudness": {
        "integrated_lufs": -18.44,
        "true_peak_dbtp": -3.98,
        "range_lu": 9.4,
        "target_lufs": -18,
        "target_true_peak_dbtp": -2
      },
      "id": "dreaming-together",
      "worlds": [
        "bloom",
        "night"
      ],
      "styles": [
        "modern",
        "ambient",
        "chamber"
      ],
      "style_label": "Dreamy piano / strings ambient pop",
      "description": "A luminous piano motif, soft strings and a small pulse for a romantic daydream.",
      "collection": "dreams-and-songs",
      "kind": "instrumental",
      "moods": [
        "romantic",
        "dreamy"
      ],
      "language": "none",
      "lyrics": null,
      "lyrics_authorship": "Instrumental structure tags only; no lyrical text.",
      "verification_limit": "Signal and metadata verified. Instrumentation, singing, pronunciation, lyrical adherence and subjective music quality require human listening.",
      "cultural_limit": "Original creative brief. Chinese instrument references do not certify a traditional performance or arrangement."
    },
    {
      "world": "night",
      "scene": "Night · Blossom",
      "title": "上海把你轻轻留下",
      "file": "audition-shanghai-keeps-you-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "83ae0d0d-8d2f-4436-aab9-21252b20db22",
      "requested_at": "2026-10-06T06:20:35.567581+00:00",
      "prompt": "Compose a wholly original complete short song, about 55 seconds, using exactly the supplied original lyrics. Sing the lyrics naturally and intelligibly, with a memorable melodic chorus; start singing within 3 seconds, no long instrumental introduction. Clear intimate lead vocal, natural expressive dynamics, balanced studio production, modest bass, musical ending. No imitation of any existing singer or song, no environmental sounds, no spoken narration. Mostly lyrical Mandarin contemporary romantic pop ballad, all supplied lyrics in Mandarin. A warm clear female lead with gentle intimate phrasing, 80 BPM in 6/8, acoustic guitar, piano, soft strings and tiny brushed percussion. Tender luminous melody, a chorus that opens into a hopeful smile, dreamy Shanghai river lights. Keep the vocal at the front and consonants intelligible. Avoid melodrama and powerful belting.",
      "lyrics_prompt": "[Verse]\n黄浦江把晚风寄来\n梧桐影子落进你口袋\n走过外滩灯火如海\n你的笑比星光更自在\n[Chorus]\n上海把你轻轻留下\n把远方变成我们的小家\n今夜的风替我回答\n有你在的地方就有繁花\n[Outro]\n有你在的地方就有繁花",
      "lyrics_optimizer": false,
      "original_duration_seconds": 50.340862,
      "excerpt_start_seconds": 0.0,
      "duration_seconds": 50.26086167800454,
      "sample_rate": 44100,
      "channels": 2,
      "bitrate": 160000,
      "bytes": 1006803,
      "sha256": "c4fa0c312bc57126b052c92263b618fb31ecd51f98f376b9f7bff97dbbd61cfa",
      "original_sha256": "ccc2e4c48dd8f89990087fd918148ec2236555167608141813b5f10e197e3abc",
      "signal": {
        "decoded_duration_seconds": 50.26086167800454,
        "rms": 0.09099894889722512,
        "peak": 0.6080203652381897,
        "peak_dbfs": -4.321637481570095,
        "crest_db": 16.497634999650103,
        "channel_rms": [
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        "finite": true,
        "clipped_samples": 0
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      "loudness": {
        "integrated_lufs": -18.43,
        "true_peak_dbtp": -4.23,
        "range_lu": 12.2,
        "target_lufs": -18,
        "target_true_peak_dbtp": -2
      },
      "id": "shanghai-keeps-you",
      "worlds": [
        "night",
        "bloom"
      ],
      "styles": [
        "modern",
        "song"
      ],
      "style_label": "Original Mandarin romantic city song",
      "description": "An intimate Mandarin song about river lights, a remembered smile and staying in Shanghai together.",
      "collection": "dreams-and-songs",
      "kind": "vocal",
      "moods": [
        "romantic",
        "dreamy"
      ],
      "language": "Mandarin",
      "lyrics": "[Verse]\n黄浦江把晚风寄来\n梧桐影子落进你口袋\n走过外滩灯火如海\n你的笑比星光更自在\n[Chorus]\n上海把你轻轻留下\n把远方变成我们的小家\n今夜的风替我回答\n有你在的地方就有繁花\n[Outro]\n有你在的地方就有繁花",
      "lyrics_authorship": "Original project lyrics written for this generation; no existing song lyrics or named-artist imitation.",
      "verification_limit": "Signal and metadata verified. Instrumentation, singing, pronunciation, lyrical adherence and subjective music quality require human listening.",
      "cultural_limit": "Original creative brief. Chinese instrument references do not certify a traditional performance or arrangement."
    },
    {
      "world": "bloom",
      "scene": "Blossom · Night · Today",
      "title": "送你一座城 · A World for You",
      "file": "audition-a-world-for-you-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "bdd9eb3a-38e4-4838-8c58-4d80a6e14eac",
      "requested_at": "2026-10-06T06:20:35.568044+00:00",
      "prompt": "Compose a wholly original complete short song, about 55 seconds, using exactly the supplied original lyrics. Sing the lyrics naturally and intelligibly, with a memorable melodic chorus; start singing within 3 seconds, no long instrumental introduction. Clear intimate lead vocal, natural expressive dynamics, balanced studio production, modest bass, musical ending. No imitation of any existing singer or song, no environmental sounds, no spoken narration. Bilingual romantic dream-pop miniature: Mandarin verse, English chorus exactly as supplied, a warm clear male tenor with gentle delivery and no imitation of any known voice. 88 BPM in 4/4, intimate piano and fingerpicked guitar, soft luminous synth textures behind the instruments, light clean pop pulse. Affectionate, magical and hopeful; the chorus offers a whole little world as a gift. Clear natural pronunciation in both languages, tuneful memorable hook, not theatrical.",
      "lyrics_prompt": "[Verse]\n我把江边的风轻轻收藏\n把花开的街角放在你身旁\n就算我们隔着千山万水\n推开这道光就能回到这里\n[Chorus]\nA little world for you and me\nA river of light, a place to be\nTake my hand, the city is new\nEvery street leads back to you\n[Outro]\n送你一座城 陪你做个梦",
      "lyrics_optimizer": false,
      "original_duration_seconds": 70.960181,
      "excerpt_start_seconds": 1.0,
      "duration_seconds": 57.000249433106575,
      "sample_rate": 44100,
      "channels": 2,
      "bitrate": 160000,
      "bytes": 1141595,
      "sha256": "a263970a748dffeb4e4f92e61a506a349059dbc4d2668c27eebe9690e050a2e4",
      "original_sha256": "350fc71d29c40a67e7538c513ae36a144b66f7c6aab5b13b5169610c14562ef1",
      "signal": {
        "decoded_duration_seconds": 57.000249433106575,
        "rms": 0.09995911071894384,
        "peak": 0.39168575406074524,
        "peak_dbfs": -8.14124447638598,
        "crest_db": 11.86230784774976,
        "channel_rms": [
          0.09955771972269753,
          0.10035889634238186
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        "finite": true,
        "clipped_samples": 0
      },
      "loudness": {
        "integrated_lufs": -18.45,
        "true_peak_dbtp": -7.98,
        "range_lu": 4.6,
        "target_lufs": -18,
        "target_true_peak_dbtp": -2
      },
      "id": "a-world-for-you",
      "worlds": [
        "bloom",
        "night",
        "today"
      ],
      "styles": [
        "modern",
        "song"
      ],
      "style_label": "Original bilingual dream-pop gift song",
      "description": "Mandarin verses and an English chorus offer someone a walkable city made of shared dreams.",
      "collection": "dreams-and-songs",
      "kind": "vocal",
      "moods": [
        "romantic",
        "dreamy"
      ],
      "language": "Mandarin / English",
      "lyrics": "[Verse]\n我把江边的风轻轻收藏\n把花开的街角放在你身旁\n就算我们隔着千山万水\n推开这道光就能回到这里\n[Chorus]\nA little world for you and me\nA river of light, a place to be\nTake my hand, the city is new\nEvery street leads back to you\n[Outro]\n送你一座城 陪你做个梦",
      "lyrics_authorship": "Original project lyrics written for this generation; no existing song lyrics or named-artist imitation.",
      "verification_limit": "Signal and metadata verified. Instrumentation, singing, pronunciation, lyrical adherence and subjective music quality require human listening.",
      "cultural_limit": "Original creative brief. Chinese instrument references do not certify a traditional performance or arrangement."
    },
    {
      "world": "autumn",
      "scene": "Autumn · Today · Night",
      "title": "回家的那盏灯",
      "file": "audition-light-that-waits-01.mp3",
      "model": "minimax/music-2.5/generation",
      "gateway": "mulerun",
      "task_id": "db1e8495-c26a-47b4-a766-0f10d9bc826f",
      "requested_at": "2026-10-06T06:20:35.568269+00:00",
      "prompt": "Compose a wholly original complete short song, about 55 seconds, using exactly the supplied original lyrics. Sing the lyrics naturally and intelligibly, with a memorable melodic chorus; start singing within 3 seconds, no long instrumental introduction. Clear intimate lead vocal, natural expressive dynamics, balanced studio production, modest bass, musical ending. No imitation of any existing singer or song, no environmental sounds, no spoken narration. Mandarin acoustic city-folk pop homecoming song, all lyrics in Mandarin, warm unforced male baritone, 92 BPM in 4/4. Fingerpicked acoustic guitar, expressive piano answers, restrained cello, soft shaker and brushed snare. Begin intimate, give the chorus a broad welcoming melodic lift. A traveler returns to Shanghai and the people they love; contented, heartwarming, hopeful, not sad nostalgia. Crisp intelligible Mandarin words and an original singable chorus.",
      "lyrics_prompt": "[Verse]\n行李装着一路的晴雨\n熟悉的街声慢慢靠近\n梧桐下走过几个四季\n江边那阵风还认得你\n[Chorus]\n回家的那盏灯还亮着\n有人把晚饭热了又热\n再远的路走到这一刻\n上海说欢迎你回来了\n[Outro]\n上海说欢迎你回来了",
      "lyrics_optimizer": false,
      "original_duration_seconds": 79.876644,
      "excerpt_start_seconds": 1.0,
      "duration_seconds": 57.000249433106575,
      "sample_rate": 44100,
      "channels": 2,
      "bitrate": 160000,
      "bytes": 1141595,
      "sha256": "addfc4ac16a5c734d3ce30e93037cfe7589124fff9772caf51cbc9cf7e38a501",
      "original_sha256": "04b8fa052a6c531d891661253836b366a936bea2013b864b62b8c99741578068",
      "signal": {
        "decoded_duration_seconds": 57.000249433106575,
        "rms": 0.08997911737353524,
        "peak": 0.45387426018714905,
        "peak_dbfs": -6.861288919527626,
        "crest_db": 14.055876505411366,
        "channel_rms": [
          0.09161752603394537,
          0.08831031678156413
        ],
        "finite": true,
        "clipped_samples": 0
      },
      "loudness": {
        "integrated_lufs": -18.43,
        "true_peak_dbtp": -6.8,
        "range_lu": 6.9,
        "target_lufs": -18,
        "target_true_peak_dbtp": -2
      },
      "id": "light-that-waits",
      "worlds": [
        "autumn",
        "today",
        "night"
      ],
      "styles": [
        "acoustic",
        "song"
      ],
      "style_label": "Original Mandarin homecoming song",
      "description": "An original, hopeful Mandarin song about returning to familiar streets and someone waiting at home.",
      "collection": "dreams-and-songs",
      "kind": "vocal",
      "moods": [
        "uplifting",
        "romantic"
      ],
      "language": "Mandarin",
      "lyrics": "[Verse]\n行李装着一路的晴雨\n熟悉的街声慢慢靠近\n梧桐下走过几个四季\n江边那阵风还认得你\n[Chorus]\n回家的那盏灯还亮着\n有人把晚饭热了又热\n再远的路走到这一刻\n上海说欢迎你回来了\n[Outro]\n上海说欢迎你回来了",
      "lyrics_authorship": "Original project lyrics written for this generation; no existing song lyrics or named-artist imitation.",
      "verification_limit": "Signal and metadata verified. Instrumentation, singing, pronunciation, lyrical adherence and subjective music quality require human listening.",
      "cultural_limit": "Original creative brief. Chinese instrument references do not certify a traditional performance or arrangement."
    }
  ],
  "updated_utc": "2026-10-06T06:22:58.754212+00:00",
  "previous_candidates_preserved": true,
  "source_research_date": "2026-10-06",
  "cultural_sources": [
    {
      "id": "jiangnan-sizhu",
      "title": "Shanghai cultural heritage: Jiangnan Sizhu Music",
      "publisher": "Shanghai municipal government / Shanghai Intangible Cultural Heritage Protection Centre",
      "url": "https://english.shanghai.gov.cn/en-CultureHeritage/20240723/40afe6eae26642b88b82a0bba55c756f.html",
      "relevance": "Documents Jiangnan instrumental interplay, including erhu, pipa and bamboo winds. Informs timbral references; the generated melodies and modern pairings are original interpretations."
    },
    {
      "id": "peace-jazz",
      "title": "The Jazz Bar — Fairmont Peace Hotel",
      "publisher": "Fairmont Peace Hotel (operator)",
      "url": "https://www.fairmont.com/en/hotels/shanghai/fairmont-peace-hotel/dining/the-jazz-bar.bar.html",
      "relevance": "Operator documents the Old Jazz Band and the venue’s Shanghai jazz heritage. Informs the intimate Bund jazz brief without imitating its performers or repertoire."
    },
    {
      "id": "jz-spring",
      "title": "JZ Spring 2026 is back with jazz and Brazilian rhythms",
      "publisher": "Shanghai municipal government / Xuhui district culture and tourism administration",
      "url": "https://english.shanghai.gov.cn/en-LatestEvents/20260428/336b058bfeb843b6b19eb5343c241585.html",
      "relevance": "Documents contemporary jazz and international musical exchange around the West Bund. Supports a varied city palette; does not authenticate the specific generated fusions."
    }
  ],
  "cultural_limits": "Primary sources inform broad traditions and instrument colors only. Every new prompt requests original melodies and arrangements. Guqin/Rhodes, jazz/erhu, marimba and guitar pairings are authored fusions, not certified Jiangnan sizhu performances. Descriptions are requested directions, not verified instrumentation.",
  "new_collection": {
    "instrumentals": 5,
    "songs": 3,
    "song_languages": [
      "Mandarin",
      "Mandarin / English",
      "Mandarin"
    ],
    "human_authorization": "User requested additional Chinese, modern, Shanghai, romantic and dreamy directions and confirmed mostly Mandarin with one bilingual song; MiniMax Music 2.5 selection retained.",
    "generation_duration_limit": "The provider has no duration flag. Approximately 52–58 seconds requested; the public files are up to57-second excerpts, with actual shorter output preserved.",
    "lyrics_limit": "Lyrics are newly authored generation input. The displayed lyrics are not a verified transcription; pronunciation and adherence require listening.",
    "processing": "Same earlier two-pass -18 LUFS / -2 dBTP target, 0.45s fade-in, 2.5s fade-out, stereo44.1kHz160kbps MP3. No artificial ambient sound or external music added."
  }
}