{
  "prompt": "Genre: Chinese-style R&B Pop Ballad, pipa hook over a modern drum groove; BPM: 70; Key: B-flat Minor (pentatonic melody); Rhythm: Syncopated R&B bounce, delayed snare, laid-back modern groove; Instruments: Layer 1 (Classical Melodic Core): Pipa playing the main melodic hook with rapid tremolo. Layer 2 (Modern Rhythm Foundation): Clean acoustic drum kit and a simple electric bass guitar. Layer 3 (Harmonic Glue): Acoustic piano chords and lush orchestral string pads; Vocals: Male tenor, narrative and melancholic, clear enunciation, restrained emotional delivery; Mood: Parting sorrow and nostalgia for the past, with classical imagery of candlelight, ancient paths, and falling leaves; Production: Pipa mixed upfront and dry, vocals centered with hall reverb, modern rhythm section sits behind the classical core; Structure: Intro - Verse - Chorus - Verse - Chorus - Outro; Language: Mandarin; Highlight: The iconic Pipa melody that serves as the main instrumental hook.",
  "lyrics": "[intro]\n(Chords: Bbm - Gb - Db - Ab)\n(Sound-Design: Antique vinyl crackle, distant ambient pad)\n(Inst: Solo Pipa enters with the main hook, delicate tremolo, spacious reverb)\n(Melodic-DNA: Motif-Anatomy: Descending pentatonic phrase, dotted rhythm for a sorrowful feel; Phrase-Structure: Symmetrical 4-bar signature theme)\n(Mix: Pipa front and center, dry with long reverb tail)\n\n[verse]\n(Transition: Acoustic piano enters with soft chords, Pipa fades to background arpeggios)\n(Chords: Bbm - Gb - Db - Ab)\n(Vocal-Perf: Male tenor, low register, conversational, clear diction, melancholic storytelling)\n(Inst: Simple piano chords, sparse electric bass on root notes, Pipa plays quiet fills between vocal lines)\n(Melodic-DNA: Contour-&-Range: Narrow range, mostly stepwise motion, narrative tone)\n一盏离愁 孤单伫立在窗口\n我在门后 假装你人还没走\n旧地如重游 月圆更寂寞\n夜半清醒的烛火 不忍苛责我\n\n[chorus]\n(Transition: Acoustic drum kit enters with a slow R&B groove, orchestral strings swell in)\n(Chords: Ebm7 - Bbm - Gb - Ab)\n(Vocal-Perf: Rises to a higher, more emotional chest voice, sustained notes with natural vibrato)\n(Inst: Full texture - drums, bass, piano, lush strings, Pipa plays counter-melody against vocals)\n(Melodic-DNA: Motif-Anatomy: Pipa theme from intro is now sung; Contour-&-Range: Jumps up a fifth from the verse, wider range for emotional peak)\n谁在用琵琶弹奏 一曲东风破\n岁月在墙上剥落 看见小时候\n犹记得那年我们都还很年幼\n而如今琴声幽幽 我的等候 你没听过\n\n[verse]\n(Transition: Drums and strings drop out, returning to sparse verse texture)\n(Chords: Bbm - Gb - Db - Ab)\n(Vocal-Perf: Returns to the lower, intimate delivery)\n(Inst: Piano, bass, and Pipa fills, similar to the first verse)\n一壶漂泊 浪迹天涯难入喉\n你走之后 酒暖回忆思念瘦\n水向东流 时间怎么偷\n花开就一次成熟 我却错过\n\n[chorus]\n(Transition: Full band re-enters, dynamic lift for final emotional peak)\n(Chords: Ebm7 - Bbm - Gb - Ab)\n(Vocal-Perf: Full emotional delivery, sustained final notes)\n(Inst: All elements playing, strings more prominent, creating the final emotional peak)\n谁在用琵琶弹奏 一曲东风破\n枫叶将故事染色 结局我看透\n篱笆外的古道我牵着你走过\n荒烟蔓草的年头 就连分手都很沉默\n\n[outro]\n(Transition: All instruments except Pipa and piano fade out)\n(Chords: Bbm - Gb - Db - Ab)\n(Inst: Pipa restates the main hook melody, piano holds a final chord, fades to silence)\n(Sound-Design: Fade to black with the sound of vinyl crackle)",
  "song_id": "01_东风破_20260405",
  "_meta": {
    "provider": "google",
    "model": "gemini-2.5-pro",
    "usage": {
      "prompt_tokens": 13495,
      "completion_tokens": 1002,
      "total_tokens": 17198
    },
    "generated_at": "2026-04-05T12:18:34.736762+08:00"
  }
}