{
  "song_id": "01_Close To You_20260412",
  "prompt": "Genre: Pop Ballad / Solo Piano; BPM: 90; Key: Eb Major; Rhythm: Slow, expressive 4/4 with significant rubato; piano-driven with flowing arpeggios and sustained, jazzy chords, following the vocal phrasing; Instruments: Grand Piano (warm, felt-like timbre, prominent room reverb, playing rich, extended harmony and melodic fills); Vocals: Male; soft, breathy, intimate timbre with a mix of chest voice and gentle falsetto; emotional delivery with subtle vibrato; minimal processing, natural reverb; Mood: Intimate, romantic, tender, melancholic; Production: Minimalist acoustic recording; wide stereo piano with a centered vocal; lush hall reverb creating a warm, spacious feel; focus on natural dynamics; Structure: Intro - Verse - Verse - Chorus - Verse - Interlude - Chorus - Outro; Language: English; Highlight: The rich, jazzy piano harmonies and expressive, rubato phrasing.",
  "title": "Spare Key",
  "lyrics": "[intro]\n(Chords: Ebmaj7 - Abmaj7 - Fm7 - Bb7sus4)\n(Inst: Solo piano introduces main theme with gentle arpeggios; spacious and warm tone; rubato feel.)\n(Mix: Wide stereo piano; lush hall reverb.)\n(Vocal-Perf: No vocals.)\n\n[verse]\n(Chords: Ebmaj7 - Abmaj7 - Fm7 - Bb7 - Ebmaj7)\n(Vocal-Perf: Soft, breathy chest voice; mezzo-piano; gentle onset.)\n(Inst: Piano provides sparse, supportive chords, leaving space for the vocal.)\n(Melody-Contour: Mostly descending, conversational.)\nYour jacket's still draped across my chair\nSmells like cedar, like you were there\nI keep the thermostat where you liked it\nCold enough to need a second layer\n\n[verse]\n(Chords: Ebmaj7 - Abmaj7 - Fm7 - Bb7 - Ebmaj7 - G7)\n(Vocal-Perf: Dynamics build slightly; introduces subtle head voice on higher notes.)\n(Inst: Piano becomes slightly more active with passing notes and richer chord voicings.)\n(Transition: A suspended G7 chord creates tension leading into the chorus.)\nThere's a mug I never moved back\nA half-read novel, a borrowed track\nAll these ordinary things you left\nAre louder than anything I lack\n\n[chorus]\n(Chords: Cm7 - F7 - Bbmaj7 - Ebmaj7 - Bbm7 - Eb7 - Abmaj7 - G7)\n(Vocal-Perf: More emotional intensity; fuller chest voice, rising to mezzo-forte.)\n(Hook-DNA: Rich, jazzy piano harmonies recontextualize the melody, using extended chords (7ths, 9ths) to create a sophisticated, emotional backdrop.)\n(Mix: Vocals remain centered but feel fuller; piano harmony widens.)\nI still carry your spare key\nLong after the door was closed to me\nA small brass weight in my coat pocket\nThe only thing I couldn't set free\nSo I hold it, hold it, quietly\nLike proof that you were real to me\n\n[verse]\n(Chords: Ebmaj7 - Abmaj7 - Fm7 - Bb7 - Ebmaj7)\n(Vocal-Perf: Returns to a softer, more intimate dynamic.)\n(Inst: Piano plays delicate arpeggios underneath the vocal.)\n(Transition: Piano holds the final chord, letting it decay into the interlude.)\nI passed your building on a Tuesday\nThe mailbox name had already changed\nI memorized the number anyway\nLike something too old to be erased\n\n[interlude]\n(Chords: Ebmaj7 - Adim7 - Cm7 - F9 - Bbm7 - Eb7 - Abmaj7)\n(Inst: Expressive solo piano improvisation; explores melodic themes with rich, complex harmonies and a free, rubato rhythm.)\n(Mix: Piano takes center stage, full dynamic and stereo range.)\n(Vocal-Perf: No vocals.)\n\n[chorus]\n(Chords: Cm7 - F7 - Bbmaj7 - Ebmaj7 - Bbm7 - Eb7 - Abmaj7 - G7)\n(Vocal-Perf: Most powerful and emotional delivery; use of falsetto for emphasis; full mezzo-forte.)\n(Inst: Piano plays with more dynamic force, using fuller block chords to support the vocal climax.)\n(Mix: The most expansive point in the mix; reverb is most prominent.)\nI still carry your spare key\nLong after the door was closed to me\nA small brass weight in my coat pocket\nThe only thing I couldn't set free\nSo I hold it, hold it, quietly\nLike proof that you were real to me\n\n[outro]\n(Chords: Ebmaj7 - Abmaj7 - Fm7 - Bb7 - Ebmaj7)\n(Vocal-Perf: Decrescendos to a whisper; final phrases are drawn out and fragile; ad-libbed falsetto.)\n(Inst: Piano slows down (ritardando); plays final arpeggiated chords that slowly fade out.)\n(Structure: Extended fade out with repeating vocal motif.)\nMaybe one day I'll give it back\nLeave it somewhere along the track\nBut not tonight, not in the dark\nI'll keep it warm inside my hand\nJust a little longer\nJust a little longer",
  "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小的黄铜旧钥匙的剪影，轻轻放置在一件深色大衣的口袋边缘，窗户框架和薄薄的百叶窗光影斜斜地投射在口袋所在的织物平面上，光线带有傍晚钨丝灯的暖黄色调。整个投影区域具有淡金色、带微粒感的纹理，类似于旧丝网印刷（Screenprint），投影边缘柔软、朦胧。背景是一个深蓝灰色的实色区域，带有极细腻、几乎感知不到的布料纹理。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": "一把小小的黄铜旧钥匙的剪影，轻轻放置在一件深色大衣的口袋边缘，窗户框架和薄薄的百叶窗光影斜斜地投射在口袋所在的织物平面上，光线带有傍晚钨丝灯的暖黄色调；投影区域呈淡金色、带微粒感纹理，类似旧丝网印刷；背景为深蓝灰色实色区域，带极细腻的布料质感"
  },
  "style_direction": "B",
  "style_reference": "Billie Eilish, Lorde"
}