{
  "song_id": "02_恋人_20260512",
  "prompt": "Genre: Mandopop / Ballad; BPM: 140; Key: Eb Major; Rhythm: Laid-back pop-rock groove; kick on 1 & 3, snare on 2 & 4; clean 8th-note hats; on-the-grid; Instruments: Fingerpicked steel-string acoustic; clean electric bass; dry, tight drum kit; orchestral string section; high synth bell melody; Vocals: Male tenor; clean, slightly nasal timbre; gentle verse delivery; emotional, open chorus; light compression, clean reverb; Melody: Verse: narrow range, lands on tonic; Chorus: ascending arch, resolves down; Mood: Flipping through a photo album in a quiet room, dust motes dancing in a sunbeam.; Production: High-fidelity polish; vocal-centric mix; smooth compression; wide stereo strings; clean reverb.; Language: Mandarin; Highlight: The sudden entry of the full drum kit and bass on the downbeat of the first chorus, following the sparser, unresolved pre-chorus melody.",
  "title": "骨节里的南",
  "lyrics": "[intro]\n(Hook-DNA: Rhythmic pattern: dotted-eighth + sixteenth + quarter, on beat 1; Pitch anchor: circles the 5th, resolves to tonic; Repetition: motif repeats twice, then varies)\n(Inst: Fingerpicked steel-string acoustic guitar; high-pitched synth bell melody with long delay)\n(Chords: Ebmaj7 - Abmaj7 - Ebmaj7 - Abmaj7)\n(Mix: High-fidelity, clean mix. Acoustic guitar is warm and present. Synth bell has a long reverb tail. Centered, intimate soundstage. Transparent master bus compression.)\n\n(Transition: Smooth fade-in of instruments.)\n[verse]\n(Melody-Contour: Narrow range, conversational rhythm; short phrases land on tonic and mediant.)\n(Vocal-Perf: Soft, breathy chest voice; mezzo-piano; minimal vibrato.)\n(Inst: Acoustic guitar continues; clean electric bass enters, playing root notes on downbeats.)\n(Chords: Ebmaj7 - Abmaj7 - Gm7 - Cm7 - Fm7 - Bb7)\n路过那个路口 脚步会自动慢下来\n不是因为红灯\n是身体还记得你站在那里等\n手插口袋 头微微低\n\n(Transition: Bass line becomes more melodic, subtle cymbal swell leads into pre-chorus.)\n[pre-chorus]\n(Melody-Contour: Stepwise ascending line builds tension; phrase ends unresolved on the 5th.)\n(Vocal-Perf: Intensity increases slightly; more sustained notes.)\n(Inst: Acoustic and bass continue; soft, muted kick drum enters, simple pulse.)\n(Chords: Abmaj7 - Gm7 - Cm7 - Fm7 - Abm6)\n后来换了一条路上下班\n绕远了二十分钟\n我告诉自己是因为那边堵\n没敢说是因为怕\n\n(Transition: Abm6 chord creates strong pull to chorus; vocal melody hangs unresolved, then full band enters on downbeat.)\n[chorus]\n(Hook-Recall: The repetitive rhythm of \"一再一再\" echoes the intro's Hook-DNA motif.)\n(Melody-Contour: Wide ascending arch, peaks on \"卡带\"; resolves with a descending stepwise line.)\n(Melody-Harmonic-Tension: Melody hits major 7th over root Eb chord for bittersweet tension; phrase \"已回不来\" lands on 5th over the V chord, holding tension.)\n(Vocal-Perf: Full voice, mezzo-forte; open timbre with emotional strain; controlled vibrato.)\n(Inst: Full drum kit enters; lush orchestral strings provide sustained pads; acoustic guitar strums.)\n(Chords: Ebmaj7 - Abmaj7 - Gm7 - Cm7 - Fm7 - Bb7 - Ebmaj7)\n(Mix: Stereo field widens significantly with strings; vocal layered with subtle harmonies.)\n骨节里住着一个朝南的方向\n不管走多远 它认识你在哪方\n我把指南针摔了 换了城市住\n但脚底板还是会替我找到你\n这不叫爱 叫我戒不掉的伤\n\n(Transition: Strings hold final chord; cymbal decays into the quieter bridge.)\n[bridge]\n(Melody-Contour: New syncopated melodic idea; phrases build in length and intensity.)\n(Melody-Harmonic-Tension: Melody dwells on the 2nd and 4th over minor chords; final phrase resolves strongly to the tonic, setting up the final chorus.)\n(Vocal-Perf: Narrative and dynamic; alternates between soft and strong phrases; backing vocals enter.)\n(Inst: Arrangement thins out then rebuilds; bass becomes more melodic; strings swell.)\n(Chords: Abmaj7 - Gm7 - Cm7 - Fm7 - Bb7 - Abmaj7 - Gm7 - Cm7 - Fm7 - Bb7)\n有人问我 你还好吗\n我说好 声音没抖\n只是说完之后 沉默了太久\n那个停顿 比什么都招供\n\n(Transition: Big drum fill and string swell leads directly into the final chorus.)\n[chorus]\n(Hook-Recall: The repetitive rhythm of \"一再一再\" echoes the intro's Hook-DNA motif.)\n(Melody-Contour: Wide ascending arch, peaks on \"卡带\"; resolves with a descending stepwise line.)\n(Melody-Harmonic-Tension: Melody hits major 7th over root Eb chord for bittersweet tension; phrase \"已回不来\" lands on 5th over the V chord, holding tension.)\n(Vocal-Perf: Most powerful delivery; ad-libs and harmonies added; sustained high notes.)\n(Inst: All elements at full intensity; strings play active counter-melodies; drums are powerful.)\n(Chords: Ebmaj7 - Abmaj7 - Gm7 - Cm7 - Fm7 - Bb7 - Ebmaj7)\n(Mix: Widest and loudest point of the song.)\n骨节里住着一个朝南的方向\n不管走多远 它认识你在哪方\n我把指南针摔了 换了城市住\n但脚底板还是会替我找到你\n这不叫爱 叫我戒不掉的伤\n\n(Transition: Music holds on the final chord, then fades.)\n[outro]\n(Inst: String section plays a final, mournful melody; acoustic guitar plays simple arpeggios; intro synth bell returns.)\n(Mix: All elements slowly fade out, leaving only reverb tails of strings and synth bell.)",
  "cover_prompt": "生成一张无字音乐专辑封面。风格参照日本「もの派」（Mono-ha）的物质感与李禹焕（Lee Ufan）绘画中「留白与一笔」的克制美学，结合湿拓画（Ebru / paper marbling）的有机纹理。画面核心：一根极细的墨线，从画面左下角以微微弯曲的弧度延伸向右上方，在距画面中心偏左处自然停止、墨迹渗开，像一次没有终点的行走轨迹；背景是从暖灰白向深蓝灰过渡的宣纸底色，左侧隐约可见罗盘刻度的残影，色调极淡，几乎融入纸纹之中。\n技法要求：几何图形的边缘必须是颜料在湿润纸面上自然扩散形成的（ink bleeding on wet paper），而非数字绘制的精准轮廓。背景需要呈现真实手工纸的纤维质感（visible paper fibers, deckled edges texture），可以带有轻微的水渍痕迹（watermark stains）和纸张泛黄的老化感。构图极度克制，大面积留白，主体偏离中心（off-center composition）。整体像一张被扫描的实体版画作品（scanned fine art print），而非数字生成图像。\n绝对禁止：任何文字/字母/拼音、人物或人物轮廓、复杂场景、风景照片感、3D渲染、塑料质感的光泽。",
  "cover": {
    "template_id": 2,
    "template_name": "几何光影艺术流",
    "scene_description": "一根极细的墨线从画面左下角以微微弯曲的弧度延伸向右上方，在距画面中心偏左处自然停止、墨迹渗开，像一次没有终点的行走轨迹；背景是从暖灰白向深蓝灰过渡的宣纸底色，左侧隐约可见罗盘刻度的残影，色调极淡，几乎融入纸纹之中。"
  }
}