{
  "song_id": "02_半点心_20260404",
  "prompt": "Genre: 80s Cantopop Ballad; BPM: 68; Key: A minor; Rhythm: Slow, steady 4/4 drum machine backbeat with a prominent gated reverb snare on beats 2 and 4, simple root-note bassline on downbeats, and 8th-note hi-hats; Instruments: Lush string synth pads, bell-like DX7-style E-Piano for arpeggios, clean round synth bass, drum machine (TR-707 style), and a clean chorused electric guitar for subtle fills; Vocals: Male; Clear, emotive baritone with a smooth delivery, processed with plate reverb and a touch of delay; Mood: Melancholic, yearning, heartbroken, romantic; Production: Polished 80s studio sound with a wide stereo image, vocals front and center, with the snare reverb being a key sonic element; Structure: Intro, Verse, Pre-Chorus, Chorus, Verse, Chorus, Bridge, Outro; Language: Cantonese; Highlight: The massive gated reverb on the snare drum.",
  "title": "旧信箱",
  "lyrics": "[intro]\n(Chords: Am - G - C - Fmaj7)\n(Hook-DNA: Bell-like synth lead melody establishes the melancholic theme)\n(Inst: Lush synth pads, bell-synth lead, subtle rhythm section enters at the end)\n(Mix: Wide stereo field, lead synth centered with reverb)\n\n[verse]\n(Transition: Smooth entry of vocals over sparse beat)\n(Chords: Am - G - C - Fmaj7)\n(Vocal-Perf: Soft, narrative chest voice, mezzo-piano)\n(Inst: Sparse arrangement; synth pads, simple bassline, drum machine with iconic gated snare on 2 and 4, clean guitar arpeggios)\n(Melody-Contour: Conversational, mostly stepwise motion)\n那年夏天快将过\n你笑着说要走啦\n留下一封没署名的信\n压在旧茶杯下\n\n[pre-chorus]\n(Transition: Slight drum fill, synth strings swell to build tension)\n(Chords: Dm7 - G - C - Am)\n(Vocal-Perf: Builds intensity, slight increase in volume and pitch)\n(Inst: Adds more layers of synth strings, bassline becomes more melodic)\n我翻开读了多少遍\n字迹已模糊\n每个转角每条街\n都以为是你\n\n[chorus]\n(Transition: Cymbal crash into full, lush arrangement)\n(Chords: Fmaj7 - G - Em - Am - Dm7 - G - C)\n(Vocal-Perf: More powerful, emotive, sustained notes, mezzo-forte)\n(Inst: Full ensemble; lush pads, prominent gated snare, bell synth plays counter-melodies, bass is more active)\n(Mix: Wider, more reverb on vocals and snare, highlighting the iconic 80s sound)\n原来离开\n不需要吵架\n只是某天\n你不再回家\n那段岁月\n散落如烟霞\n我独自数着窗外落下的雨\n等一个电话\n\n[verse]\n(Transition: Arrangement drops back down dynamically)\n(Chords: Am - G - C - Fmaj7)\n(Vocal-Perf: Returns to softer, more pensive delivery)\n(Inst: Similar to Verse 1, maintaining the emotional intimacy, guitar fills more present)\n旧照片褪了色\n只剩轮廓和侧脸\n你当时望向哪里\n我也望向那边\n\n[chorus]\n(Transition: Strong build-up with toms and cymbal swell)\n(Chords: Fmaj7 - G - Em - Am - Dm7 - G - C)\n(Vocal-Perf: Maximum emotion, powerful and sustained, with slight vocal grit)\n(Inst: Fullest arrangement, synth brass layers added for power and drama)\n(Mix: Widest and most powerful section of the song, vocals sit perfectly in the lush mix)\n原来离开\n不需要吵架\n只是某天\n你不再回家\n那段岁月\n散落如烟霞\n我独自数着窗外落下的雨\n等一个电话\n\n[bridge]\n(Transition: Instruments drop out momentarily, leaving a synth pad and vocals)\n(Chords: C - G/B - Am - G - F - C/E - Dm7 - G)\n(Vocal-Perf: Introspective, almost spoken, questioning tone)\n(Inst: Stripped back arrangement, bell-synth takes prominence, building back up with strings at the end)\n若果当初我多问一句\n你会否多留一夜\n还是终归要散\n只差早与晚而已\n\n[outro]\n(Transition: Fades in from the end of the bridge chorus, feels like a final plea)\n(Chords: Fmaj7 - G - C - C)\n(Vocal-Perf: Desperate, pleading, repeated phrases with heavy reverb, fading out)\n(Inst: Main synth bell melody returns over the chords, all instruments slowly fade out with the vocal)\n(Structure: Long fade out)\n信里说再见\n那句话从没写完呀\n我仍放在最深那格\n连同你留低的伞\n放在那里吗",
  "cover_prompt": "生成一张极简主义的几何光影艺术图片作为无字音乐专辑封面。画面的核心是：一个边缘柔和模糊的信封形状轮廓，半透明，浮在从深靛蓝到暗紫色的水彩渐变背景中，右下角有一片极淡的暖米色光晕，仿佛旧纸张在夜色里微微发光。画面必须展现出微妙的高级材质肌理，特别是类似水彩晕染（Watercolor texture）或粗糙艺术纸张的触感。整体构图极度克制、留白（Minimalistic composition），注重光与影的柔和交错（Light and shadow interplay）。强烈要求：画面必须保持极致的安宁与静谧（Calm and serene），除了基础的、柔焦的简单几何图形（如模糊的圆、半透明的方块或柔和的线条）外，绝对不要出现任何复杂的现实物体、风景或人物！画面必须是无字封面，绝对不要生成任何文字、拼音或英文字母！绝对不要生成人物轮廓。传达出一种充满诗意、呼吸感与冥想空间的视觉感受。",
  "cover": {
    "template_id": 2,
    "template_name": "几何光影艺术流",
    "scene_description": "一个边缘柔和模糊的信封形状轮廓，半透明，浮在从深靛蓝到暗紫色的水彩渐变背景中，右下角有一片极淡的暖米色光晕，仿佛旧纸张在夜色里微微发光"
  }
}