{
  "song_id": "01_Thinkin' Bout You (Ryan Hemsworth Bootleg)_20260412",
  "prompt": "Genre: Alternative R&B / Lo-fi Pop; BPM: 130; Key: F# Minor; Rhythm: Lazy, half-time trap groove with rapid 16th-note hi-hats creating a slow-fast rhythmic tension; Instruments: Distant felt piano arpeggios, washed-out detuned synth pads, deep sine sub-bass, lo-fi sampled drum kit with roomy snare and sizzly hats; Vocals: Male tenor with a smooth, intimate close-mic delivery in verses, shifting to a soaring, layered falsetto in the chorus, featuring lush background vocal stacks; Mood: Lying on your bedroom floor at 3 AM, staring at the ceiling, replaying conversations in your head while the city hums outside; Production: High-Fidelity, Pristine Radio-Ready Mix with expensive analogue warmth and silky smooth high-end. Lush reverb washes, a warm sub-bass anchor, and a wide stereo image; Highlight: The abrupt shift at 2:26 from smooth singing to a raw, close-mic'd spoken-word verse, breaking the song's hypnotic feel with unexpected lyrical intimacy.",
  "title": "Spare Key",
  "lyrics": "[intro]\n(Mix: High-Fidelity, Pristine Radio-Ready Mix. Sub-heavy but controlled low-end, warm analogue mids, silky smooth high-end. Wide stereo image with deep reverb space. Centered lead vocals, wide BGV stacks. Punchy parallel compression on drums.)\n(Inst: Distant felt piano arpeggio, washy analog synth pads, sine sub-bass, lo-fi trap beat with 16th hats.)\n(Hook-DNA: Vocal chop motif. Rhythmic pattern: eighth-eighth-quarter. Pitch anchor: circles the 5th and 3rd. Repetition: repeats with increasing filtering and delay throws.)\n(Sound-Design: Subtle vinyl crackle.)\n\n[verse]\n(Vocal-Perf: Intimate, close-mic'd, breathy tenor. Relaxed rap-sung delivery. Transitions to dreamy, layered head voice.)\n(Inst: Beat strips back to kick, hats, sub-bass. Synth pad is filtered down. Piano melody continues.)\n(Melody-Rhythm: Vocal phrases start consistently on the upbeat of 1, syncopated and conversational.)\n(Melody-Contour: Mostly flat, spoken-like contour, ending with an ascending leap of a 4th.)\n(Chords: F#m7 - Amaj7 - Emaj7 - Bm7)\nFound your spare key at the back of my drawer\nTaped to a receipt from some grocery store\nApril, the one with the rain every morning\nI kept it without really knowing what for\nGuess I was holding\nOoh something still\nLike the static hum of a phone left on\nWaiting for a signal\nthat already moved on\n\n[chorus]\n(Mix: Wider stereo field. Drums hit harder. Vocal layers increase.)\n(Vocal-Perf: Shifts to a soaring, layered falsetto. Lush background vocal stacks enter, creating a choir effect.)\n(Inst: Full arrangement. Bright synth layer added. Roomy snare/clap is prominent.)\n(Hook-DNA: Main hook \"thinkin' 'bout forever\". Rhythmic pattern: syncopated, pushes before the beat. Pitch anchor: melody centers around the high root. Repetition: Phrase repeats, with the \"oooh\" tag resolving it.)\n(Melody-Contour: Ascending leap of a perfect 5th to the hook's highest note, creating an arch shape.)\n(Melody-Harmonic-Tension: Melody's peak on \"forever\" hits the 9th over the Bm7 chord, creating bright tension before resolving down on the final \"oooh\" over F#m7.)\n(Chords: Amaj7 - Emaj7 - Bm7 - F#m7)\nOr was I waiting on a door you already closed\n'Cause I've been carrying something I can't let go Oooh\nOr was I waiting on a door you already closed\n'Cause I've been carrying something I can't let go Oooh\n\n[verse]\n(Vocal-Perf: Same intimate, close-mic'd delivery, with a slightly more playful, sarcastic tone.)\n(Inst: Same stripped-back arrangement as first verse.)\n(Melody-Rhythm: Similar conversational, syncopated phrasing.)\n(Melody-Contour: Similar flat contour, with the same ascending 4th at the end.)\n(Chords: F#m7 - Amaj7 - Emaj7 - Bm7)\nI moved the furniture twice since you left\nRearranged everything, ran out of breath\nPainted over the wall where your jacket left a shadow\nBut the outline bled through\nevery coat I spread\nStill I'm holding\nOoh something still\nLike a voicemail saved so long the app flags it\nThree years of silence\nand I never deleted it\n\n[chorus]\n(Vocal-Perf: Full energy, soaring falsetto with more ad-libs and background layers.)\n(Inst: Full arrangement.)\n(Hook-DNA: Same hook as before, delivered with more intensity.)\n(Melody-Harmonic-Tension: Same tension and release pattern as the first chorus, emphasizing the emotional core.)\n(Chords: Amaj7 - Emaj7 - Bm7 - F#m7)\nOr was I waiting on a door you already closed\n'Cause I've been carrying something I can't let go Oooh\nOr was I waiting on a door you already closed\n'Cause I've been carrying something I can't let go Oooh\n\n[bridge]\n(Mix: Arrangement drops out, leaving a dry, centered vocal. Reverb swells in and out.)\n(Vocal-Perf: Abrupt shift to a raw, almost-spoken-word delivery. Dry and upfront.)\n(Inst: Drums and bass drop out. Filtered, pulsing synth pad. Beat re-enters halfway through.)\n(Melody-Harmonic-Tension: Rhythmic tension replaces melodic. Rapid-fire spoken phrases create metric dissonance against the slow pad, resolving when the beat re-enters and locks the vocal in.)\n(Chords: A - E - Bm - F#m)\nYeah I know\nI should've mailed it back by now\nBut I don't\nThere's something honest in the weight of it\nCold metal\nA whole life condensed down to one small thing\nI keep it\nLike a sentence I never finished saying out loud\n\n[outro]\n(Mix: Most expansive and dense section. Vocals soaked in reverb and delay.)\n(Vocal-Perf: Main chorus melody sung with maximum emotional intensity, surrounded by ad-libs, harmonies, and vocal runs.)\n(Inst: All elements at full force. Drums are heavily saturated. Hi-hat pattern becomes more complex.)\n(Sound-Design: Filter sweeps on the whole mix during fade-out, leaving only piano and reverb tail.)\n(Chords: Amaj7 - Emaj7 - Bm7 - F#m7)\nOr was I waiting on a door you already closed Closed\n'Cause I've been carrying something I can't let go Oooh\nOr was I waiting on a door you already closed",
  "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。画面的核心是一把小巧的金属钥匙的剪影，静静地躺在一个略带褶皱的信封上，从画面一侧投来的柔和侧光在信封表面投下钥匙细长的暗影，影子边缘虚化而略带忧郁。整个投影区域具有淡琥珀色、带颗粒感的纹理，类似于旧丝网印刷（Screenprint），透着一种被时间腌制过的温柔。背景是一个柔和的蓝灰色实色区域，带有微妙的纸张纹理，仿佛午后将尽时的窗纸颜色。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、舒适、怀旧且梦幻的艺术气息。",
  "cover": {
    "template_id": 6,
    "template_name": "极简窗影治愈流",
    "scene_description": "一把小巧的金属钥匙剪影静静躺在略带褶皱的信封上，柔和侧光在信封表面投下钥匙细长的暗影，影子边缘虚化带有忧郁感；投影区域呈淡琥珀色颗粒质感，类似旧丝网印刷；背景为柔和蓝灰色实色，带微妙纸张纹理，传递出被时间腌制的温柔与无法开启的执念"
  },
  "style_direction": "B",
  "style_reference": "Frank Ocean, Billie Eilish"
}