```json
{
  "song_id": "04_Chanel_20260412",
  "prompt": "Genre: Alternative R&B with ambient pop and lo-fi hip-hop influences; BPM: 75; Key: F Major (with modal ambiguity); Rhythm: Slow, behind-the-beat trap groove with a deep, syncopated kick and skittering 16th-note hi-hats creating a laid-back but driving pocket syncopation.; Instruments: Washed-out Rhodes piano; close-mic'd felt hammers, hazy reverb. Deep 808 sub-kick; dry snap snare; skittering 16th hats. Subtle sine-wave sub; doubles piano root. Ambient, airy synth pads; slow attack/release. Pitched-up vocal chops; used as texture.; Vocals: Male tenor, shifting between relaxed singing and conversational rap-singing. intimate close-mic delivery with subtle, effect-driven pitch correction and occasional lush background vocal stacks.; Highlight: The abrupt transition where the main intimate vocal cuts out, replaced by a high-pitched, processed vocal melody that re-contextualizes the entire track's harmonic feel, creating a brain-scratching melodic hook.",
  "title": "Voicemail Draft",
  "lyrics": "[intro]\n(Hook-DNA: Main keyboard motif is a four-chord loop with a simple, melancholic top-line melody; repeats every four bars; anchors on the tonic of Fmaj7.)\n(Inst: Washed-out Rhodes piano with heavy chorus/vibrato; solo.)\n(Mix: Wide stereo field. Prominent low-end warmth, slightly recessed low-mids for clarity. Silky, smooth high-end. Instruments sit in a lush, medium-decay plate reverb. Very dynamic, minimal bus compression.)\n\n[verse]\n(Vocal-Perf: Low-key, almost spoken-word delivery; close-mic'd with audible breath sounds.)\n(Melody-Rhythm: Vocal phrases start on the 'and' of beat 2, weaving around the sparse kick pattern.)\n(Melody-Contour: Primarily monadic with slight upward inflections at the end of lines.)\n(Chords: Fmaj7 - Gm7 - Am7 - Gm7)\n(Inst: Rhodes piano continues; a deep 808 sub-kick and crisp, dry snare enter, creating a sparse backbeat. Skittering 16th-note hi-hats provide forward momentum.)\nStill got your number saved under a different name\nSo I don't reach for it every time the longing came\nThirty-seven seconds — recorded, then erased\nWhat I needed to say just dissolved without a trace\nThe laundry's still folded the way you used to do\nCorners tucked so neat, like a leftover of you\nI changed the pillowcase but kept the old routine\nSmall sabotage, the kind that nobody else can see\n\n[chorus]\n(Vocal-Perf: Shifts to a smooth, melodic sung vocal; airy backing vocal layers enter, subtly panned.)\n(Hook-DNA: Core motif is a descending two-note phrase on "two ways"; repeats twice with identical rhythm; anchors on the 5th of the scale.)\n(Melody-Contour: Gentle arch shape, starts on the 5th, dips to the 2nd, resolves back to the 3rd.)\n(Melody-Harmonic-Tension: The first note of the main phrase creates a brief, pleasing dissonance (the 9th) over the root chord, resolving down by a step on the next beat.)\n(Chords: Fmaj7 - Gm7 - Am7 - Gm7)\n(Mix: Vocal layers widen the stereo image; snare has a touch more reverb.)\nI keep the draft saved, never press send\nClose the app, open it up again\nAll the things I almost said just hover in the air\nA voicemail I keep drafting — you'll never know it's there\n\n[verse]\n(Vocal-Perf: Returns to the conversational, rhythmic flow of the first verse, slightly more energy.)\n(Melody-Rhythm: Tighter syncopation, more words per bar, pushing the beat slightly.)\n(Melody-Contour: Still relatively flat, but with more dynamic variation between soft and loud syllables.)\n(Inst: All elements from previous sections continue; a very subtle, low-passed synth pad with a slow attack floats underneath.)\nI ran into someone who knew us back when\nSmiled through the whole thing, didn't flinch, didn't bend\nSaid yeah I'm good, said yeah it's been a minute\nLaughed a little too fast — there was nothing in it\nGot home, stood still in the kitchen for a while\nStared at the fridge door, forgot why I'd walked that mile\nThe notification light blinked green then went dark\nAnd I felt something shift — somewhere past the heart\n\n[chorus]\n(Vocal-Perf: Stronger delivery than the first chorus; backing vocal harmonies are more prominent and complex.)\n(Hook-DNA: Core motif is a descending two-note phrase on "two ways"; repeats twice with identical rhythm; anchors on the 5th of the scale.)\n(Melody-Contour: Gentle arch shape, starts on the 5th, dips to the 2nd, resolves back to the 3rd.)\n(Melody-Harmonic-Tension: The first note of the main phrase creates a brief, pleasing dissonance (the 9th) over the root chord, resolving down by a step on the next beat.)\n(Chords: Fmaj7 - Gm7 - Am7 - Gm7)\n(Mix: Drums hit slightly harder with parallel compression; lead vocal has a short, syncopated slap delay.)\nI keep the draft saved, never press send\nClose the app, open it up again\nAll the things I almost said just hover in the air\nA voicemail I keep drafting — you'll never know it's there\n\n[bridge]\n(Vocal-Perf: Shifts into an airy, intimate falsetto; delivery is legato and smooth.)\n(Melody-Harmonic-Tension: Melody floats over the changes, sustaining notes (the 7th and 9th) across bar lines, creating a dreamy, unresolved feeling that only settles on the final word.)\n(Chords: Dm7 - Gm7 - C7 - Fmaj7)\n(Inst: Drums drop out, leaving only the Rhodes and the washy synth pad. A reversed piano swell transitions into the section.)\nMaybe I just need to hear the beep\nSay it to the silence, let it go to sleep\nOr maybe some things\nWeren't ever meant to reach\n\n[outro]\n(Vocal-Perf: Main vocal drops out completely. A new, high-pitched and heavily processed vocal sample becomes the lead instrument.)\n(Hook-DNA: The pitched-up vocal sample sings a simple, repetitive 4-note motif that cycles over the chord progression, creating an earworm hook.)\n(Inst: Drums re-enter with the same sparse pattern. Rhodes and pads continue as the track slowly fades out over 8 bars.)\n(Mix: A low-pass filter is slowly applied to the entire mix, making it sound distant as it fades.)\n(pitched vocal melody)\nNever pressed send… never pressed send…\nHover in the air… in the air…\n",
  "cover_prompt": "生成一张极简主义（Minimalist）插画和阴影艺术（Shadow art）风格的艺术图片作为无字音乐专辑封面。画面的核心是一部翻盖手机或旧款触屏手机静置在一张浅灰色桌面上，屏幕微微发着冷蓝色的光，屏幕上的录音波形被模糊处理成一条轻轻起伏的细线，周围没有任何人物，只有手机投下的柔和矩形阴影蔓延在桌面上。整个投影区域具有淡蓝灰色、带轻微颗粒感的纹理，类似于旧丝网印刷（Screenprint）。背景是一个浅暖灰色的实色区域，带有极其微妙的纸张质感。构图干净、宁静且优雅。强烈要求：这是一张纯粹的、极简主义、治愈系插图，绝对不要出现具体的五官、现代工业物品的复杂细节或3D渲染效果！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！传达出一种宁静、克制、若有所思且充满留白感的艺术气息。",
  "cover": {
    "template_id": 6,
    "template_name": "极简窗影治愈流",
    "scene_description": "一部旧款手机静置在浅灰色桌面上，屏幕发出冷蓝色微光，屏幕上的录音波形被柔化成一条轻轻起伏的细线，手机在桌面投下一道柔和的矩形长影，周围空无一物，整个画面只有光、影与沉默"
  },
  "style_direction": "B",
  "style_reference": "Billie Eilish, Frank Ocean"
}
```