{
  "prompt": "Genre: Cantopop / R&B Ballad; BPM: 64; Key: B Major; Rhythm: Slow, laid-back 4/4 drum beat (kick, rimshot) with flowing 16th-note feel from arpeggiated piano and acoustic guitar; Instruments: Soft Grand Piano (arpeggios, chords), Fingerpicked Acoustic Guitar (melodic fills), Clean Electric Bass (root notes), Minimalist Drum Kit (gentle backbeat), Lush String Section (pads, emotional swells); Vocals: Male tenor, soft, breathy, and intimate with controlled falsetto, emotive delivery with dynamic swells into a stronger chest voice for choruses; Mood: Melancholic, vulnerable, introspective, heartfelt; Production: Polished, clean studio mix with wide stereo field, vocals upfront, tasteful reverb creating depth and space; Structure: Intro, Verse, Chorus, Verse, Bridge, Chorus, Outro; Language: Cantonese; Highlight: the dynamic shift from intimate breathy verses to lush, string-backed choruses",
  "lyrics": "[intro]\n(Chords: C#m7 - F#7 - Bmaj7 - Emaj7)\n(Inst: Fingerpicked acoustic guitar melody; Soft piano chords enter)\n(Vocal-Perf: No vocals)\n(Mix: Intimate, narrow stereo field)\n(Sound-Design: Room ambiance)\n\n(Transition: Piano takes over as main harmonic instrument)\n[verse]\n(Chords: C#m7 - F#7 - Bmaj7 - Emaj7)\n(Inst: Piano leads with sparse chords; Acoustic guitar adds delicate fills; Bass enters with simple root notes)\n(Vocal-Perf: Soft, breathy chest voice; Conversational delivery; mezzo-piano)\n(Melody-Contour: Mostly stepwise motion; Descending lines)\n(Mix: Vocals are very dry and upfront; Instruments panned for width)\n麻烦 各位都不望我\n望住 我怎么敢去唱 情歌\n然而 我想拣今日 来流露我凄楚\n听完的人 请你扮儍\n\n(Transition: Subtle drum fill with cymbal swell)\n[chorus]\n(Chords: G#m7 - C#m7 - F#7 - Bmaj7 - Emaj7 - C#m7 - F#sus4 - F#7)\n(Inst: Drums enter with a slow backbeat (rimshot on 2 & 4); Lush string section enters with sustained pads; Piano becomes more rhythmic)\n(Vocal-Perf: Stronger chest voice; Increased volume to mezzo-forte; More vibrato; Emotional and sustained notes)\n(Mix: Wider stereo image; Strings fill the background; Vocals have more reverb)\n但唱毕 全场静 其实 路人 并不傻\n都猜中我 为你捱尽折磨\n眼泪若嫌多 用背脊唱情歌\n难道从后脑 可以望穿我 心里痛什麽\n正面像全裸\n遮丑的布 就别来戮破\n愿这歌 悲到 一转背 人间都 忘掉我\n\n(Transition: Strings hold and fade slightly, piano melody leads into verse)\n[verse]\n(Chords: C#m7 - F#7 - Bmaj7 - Emaj7)\n(Inst: Arrangement thins out again; Drums continue simple backbeat; Bass is more prominent)\n(Vocal-Perf: Returns to intimate, soft delivery; Gentle falsetto used on some phrases)\n(Mix: Focus returns to the vocal-piano-guitar trio)\n原来 我不懂怎样爱\n但是 作的恋歌也算精彩\n忘形 到真失恋后 偿还十倍悲哀\n终于一个人 站在舞台\n\n(Transition: Build in intensity with strings swelling and piano becoming more dynamic)\n[bridge]\n(Chords: Emaj7 - F#7 - G#m7 - Bmaj7/D# - Emaj7 - F#7 - Bsus4 - B)\n(Inst: Strings become more prominent with melodic counterpoint; Drums build with tom fills)\n(Vocal-Perf: Builds from restrained to powerful; Sense of desperation; Reaches highest point dynamically)\n(Melody-Contour: Ascending sequence, building tension towards the chorus)\n(Mix: Dynamic swell, growing louder and fuller)\n愿这歌 流行着 遗下 二人 没将来\n歌者痛了 人们还在喝采\n\n(Transition: Percussive hit and momentary pause before final chorus drops)\n[chorus]\n(Chords: G#m7 - C#m7 - F#7 - Bmaj7 - Emaj7 - C#m7 - F#sus4 - F#7)\n(Inst: Fullest arrangement; Strings are soaring; Drums are more powerful with cymbal crashes)\n(Vocal-Perf: Peak emotional delivery; Full chest voice, almost strained; Ad-libs in falsetto)\n(Mix: Widest and loudest point of the song; Everything is present and powerful)\n(Highlight: Vocal performance contrasts intimacy of verses with raw power here, supported by the full string section)\n眼泪若嫌多 用背脊唱情歌\n难道从后脑 可以望穿我 心里痛什麽\n正面像全裸\n遮丑的布 就别来戮破\n世事没如果 别再冀盼如果\n明明 放低的你 经已唱新歌\n我尚在如此 不知丑 唱着别离开我\n失去你 唯有等歌迷去 喜欢我\n\n(Transition: Decrescendo; instruments begin to fade)\n[outro]\n(Chords: C#m7 - F#7 - Bmaj7 - Emaj7 - Bmaj7)\n(Inst: Piano and acoustic guitar play a final, sparse melodic phrase; Strings hold a final chord and fade)\n(Vocal-Perf: No vocals)\n(Structure: Fade out)\n(Mix: Reverb tails become more audible as instruments fade away)",
  "song_id": "05_用背脊唱情歌_20260406",
  "_meta": {
    "provider": "google",
    "model": "gemini-2.5-pro",
    "usage": {
      "prompt_tokens": 9239,
      "completion_tokens": 1353,
      "total_tokens": 14642
    },
    "generated_at": "2026-04-06T10:26:46.896937+08:00"
  }
}