{
  "song_id": "05_Ivy_20260412",
  "prompt": "Genre: Alternative R&B / Indie Pop Fusion; BPM: 83; Key: A Major; Rhythm: Languid, behind-the-beat groove driven by interwoven, clean electric guitar arpeggios, with minimal, almost subliminal percussion; Instruments: Layered clean guitars DI signal chorus/verb, Arpeggiated guitar audible finger noise, Warm round electric bass minimal attack, Warm analog synth pads long swells; Vocals: Male tenor, strained emotional upper register, conversational delivery shifting to impassioned cries, featuring a brain-scratching melodic hook and lush background vocal stacks; Mood: Finding a faded polaroid from a past summer in a forgotten shoebox, the specific mix of sharp memory and blurred emotion; Highlight: The sudden, jarring shift at 03:25 where the lead vocal breaks into a raw, distorted scream over a wall of guitar feedback, shattering the song's dreamy texture.",
  "title": "Spare Key",
  "lyrics": "[verse]\n(Mix: Full mix baseline: Intimate and wide. Layered clean guitars panned hard L/R creating a rich stereo field. Vocals sit dead center, forward, with subtle plate reverb. Bass is warm, round, and centered. Minimal compression, dynamic.)\n(Inst: Clean arpeggiated e-guitar (L), Clean chordal e-guitar (R))\n(Chords: A - E - F#m - D)\n(Vocal-Perf: Conversational, slightly strained tenor, intimate delivery)\n(Melody-Rhythm: Phrases starting on beat 1, simple quarter/eighth note rhythms, conversational flow.)\n(Melody-Contour: Mostly stepwise motion, small melodic range, reflecting spoken cadence.)\nYou left a spare key underneath my welcome mat\nI kept it in the zipper of a bag I never unpack\nSomewhere between the ticket stubs and a receipt from June\nProof that you were here\nBefore the whole thing came unglued\n\n[chorus]\n(Mix: Energy lift via added vocal layers and slightly more prominent bass.)\n(Inst: Additional harmony guitar enters, Subtle bass synth pad swells.)\n(Chords: A - E - F#m - D)\n(Vocal-Perf: More impassioned, higher register, lush background vocal stacks enter, creating a wash of sound.)\n(Hook-DNA: Rhythmic motif: two stressed eighth notes followed by a descending quarter note phrase; Pitch anchor: Melody circles the 3rd and 5th of the key, resolving to the root on the final word; Repetition: Core phrase repeats twice with slight lyrical variation.)\n(Melody-Contour: Arch shape, ascending P4 leap from 5 to root, then descending stepwise.)\n(Melody-Rhythm: Syncopated entry before beat 1, creating a sense of urgency before settling into the downbeat.)\n(Melody-Harmonic-Tension: Melody holds the major 7th over the V chord for a full beat, creating a poignant, unresolved feeling before resolving down to the 3rd of the tonic chord.)\nI still sleep on my side of the bed\nLike there's somebody lying to my left\nGhost of a habit, ghost of your breath\nI keep the spare key\nI keep the spare key\nEven though the lock has changed\nI keep the weight of what we were\nLike it's something I can claim\nStill keep the spare key\n\n[verse]\n(Mix: Pulls back to verse 1 texture.)\n(Inst: Guitar layers simplified slightly, one guitar drops out.)\n(Chords: A - E - F#m - D)\n(Vocal-Perf: Returns to intimate, close-mic delivery, more rhythmic complexity in phrasing.)\nI ran the tap till the water turned cold last night\nStood there long enough to watch the mirror fog and clear twice\nYour conditioner's still sitting on the second shelf\nI can't throw it out\nI can't explain that to myself\n\n[chorus]\n(Mix: Similar build to first chorus, but with more intense background vocal layers.)\n(Inst: Bassline becomes slightly more melodic.)\n(Chords: A - E - F#m - D)\n(Vocal-Perf: Lead vocal feels more desperate, almost on the edge of breaking. Background vocals are wider and more processed.)\n(Hook-DNA: Same as first chorus, but the delivery adds a new layer of emotional weight.)\n(Melody-Harmonic-Tension: Tension is heightened by the vocal performance pushing the pitch slightly sharp on the held 7th, increasing the emotional strain.)\nI still sleep on my side of the bed\nLike there's somebody lying to my left\nGhost of a habit, ghost of your breath\nI keep the spare key\nI keep the spare key\nEven though the door won't open anymore\nI keep the shape of what we had\nLike an old scar you still explore\nStill keep the spare key\n\n[bridge]\n(Mix: Texture thins out dramatically, creating space.)\n(Inst: Only a single, sparse arpeggiated guitar remains.)\n(Chords: D - A/C# - Bm - E)\n(Vocal-Perf: Almost spoken-word, rhythmically complex, a rapid-fire delivery of memories.)\n(Melody-Rhythm: Rapid 16th-note phrasing, flowing over the bar lines, contrasting with the slow harmonic rhythm.)\n(Melody-Harmonic-Tension: Melody intentionally avoids chord tones, floating on the 2nd and 4th over the progression, creating a feeling of narrative detachment before landing hard on the root of the final V chord, setting up the climax.)\nYou forwarded your mail in October\nChanged your number sometime after that\nI found your handwriting on a grocery list\nTucked inside a paperback\nApples, shampoo, call the dentist, call me back\nCall me back\nI didn't throw it out\nI folded it and put it back\n\n[outro]\n(Mix: Complete deconstruction. Heavy saturation, distortion, clipping. Stereo image collapses into a chaotic mono-centric wall of sound. Extreme dynamic range shift.)\n(Sound-Design: The sound of physical destruction, equipment being pushed past its limits.)\n(Inst: Guitar feedback, Distorted overdriven guitars, Room noise becomes audible.)\n(Vocal-Perf: Shifts from singing to raw, distorted screaming. Pitch is secondary to emotional expression. Multiple vocal takes overlap chaotically.)\nIt's just a key, it's just a key\nJust a key, it doesn't mean a thing\nIt's just the weight of a small ordinary thing\nThat I can't\nThat I won't\nThat I keep\nI keep\nI keep it\nI keep it\nI keep",
  "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：一把形状模糊、边缘柔化的旧钥匙轮廓，处于从灰蓝到暖米色的水彩渐变背景中，钥匙的投影以淡淡的暖橘色晕开，仿佛一段记忆在纸上慢慢褪色，整体笔触轻柔如水彩晕染。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": "一把形状模糊、边缘柔化的旧钥匙轮廓，处于从灰蓝到暖米色的水彩渐变背景中，钥匙的投影以淡淡的暖橘色晕开，仿佛一段记忆在纸上慢慢褪色，整体笔触轻柔如水彩晕染"
  },
  "style_direction": "B",
  "style_reference": "Bon Iver, Phoebe Bridgers, Sufjan Stevens"
}