{
  "song_id": "",
  "prompt": "Genre: Mandopop / Pop Ballad; BPM: 62; Key: C Major; Chords: C-G-Am-F (I-V-vi-IV); Rhythm: Slow, half-time lo-fi R&B drum groove. Soft kick, clap on 3, 16th-note hi-hats. Sub-bass follows kick.; Instruments: Lo-fi drum machine, deep sub-bass, clean electric piano, delayed/reverbed clean electric guitar arpeggios, atmospheric synth pads.; Vocals: Female, soft, breathy, airy mid-range. Heavy reverb and subtle delay for a dreamy feel.; Mood: Melancholic, nostalgic, dreamy, introspective, longing.; Production: Wide, spacious mix with centered vocals in a reverb wash. Guitars and pads create a wide stereo image. Polished, dreamy aesthetic.; Structure: Chorus - Chorus - Outro; Language: Mandarin; Highlight: The fusion of soft, breathy female vocals with a dreamy, reverb-drenched lo-fi R&B instrumental to create intimate melancholy.",
  "title": "回声",
  "lyrics": "[chorus]\n(Inst: Lo-fi drum loop, deep sub-bass, clean electric piano chords, subtle atmospheric pad.)\n(Chords: C - G - Am - F)\n(Vocal-Perf: Soft, airy, intimate, minimal vibrato, mid-range.)\n(Melody-Contour: Descending phrases, gentle and stepwise.)\n(Mix: Vocals centered in a wash of reverb, creating a spacious, lonely feel. Instruments provide a warm, looping bed.)\n你走后 整间屋子空得发痛\n你的气息还缠在每一缕晚风之中\n我蜷在沙发上 假装自己很放松\n眼泪却顺着脸颊汹涌\n这寂静 比所有争吵都沉重\n我在你的余温里 活成一场醒不来的梦\n\n(Transition: Clean electric guitar enters with a delicate, delayed arpeggio pattern.)\n\n[chorus]\n(Inst: Full texture. Drum loop, sub-bass, E-piano, pads, and prominent delayed electric guitar arpeggios.)\n(Chords: C - G - Am - F)\n(Vocal-Perf: Consistent breathy delivery. Faint vocal harmony layer on the last line for emphasis.)\n(Melody-Dev: Guitar provides a melodic counterpoint to the main vocal line.)\n(Mix: Wider stereo image due to panned guitar. Mix feels fuller and more immersive, energy lifts slightly.)\n你走后 整间屋子空得发痛\n你的气息还缠在每一缕晚风之中\n我蜷在沙发上 假装自己很放松\n眼泪却顺着脸颊汹涌\n这寂静 比所有争吵都沉重\n我在你的余温里 活成一场醒不来的梦\n\n(Transition: Vocals end, instruments continue, transitioning into the final section.)\n\n[outro]\n(Inst: All instruments continue. Delayed electric guitar becomes the lead melodic voice.)\n(Chords: C - G - Am - F)\n(Structure: Instrumental loop of the chorus progression.)\n(Melody-Dev: Guitar melody repeats with slight variations, carrying the emotional weight.)\n(Mix: Gradual fade out of all elements. Reverb and delay tails linger, emphasizing the dreamy, empty space.)",
  "cover": {
    "template_id": 1,
    "template_name": "复古空旷风景流",
    "scene_description": "清晨时分一片被浓雾完全吞没的空旷湖面，湖水呈现沉郁的灰蓝色调，远处的山丘轮廓在雾气中若隐若现几乎消融，水面纹丝不动如同一面蒙尘的镜子，天空是压抑的铅白色与湖面几乎融为一体分不清边界，整个画面弥漫着被世界遗忘的、无人问津的空旷寂寥感",
    "cover_prompt": "生成一张拍立得（Polaroid）风格的无字版音乐专辑封面。画面描绘的是：清晨时分一片被浓雾完全吞没的空旷湖面，湖水呈现沉郁的灰蓝色调，远处的山丘轮廓在雾气中若隐若现几乎消融，水面纹丝不动如同一面蒙尘的镜子，天空是压抑的铅白色与湖面几乎融为一体分不清边界，整个画面弥漫着被世界遗忘的、无人问津的空旷寂寥感。整体画面必须呈现真实拍立得相片的质感：略微过曝的柔和光线、轻微偏色的复古色调、自然的暗角和柔焦边缘、细腻的胶片颗粒感。色彩是褪色、怀旧的暖色调，仿佛一张被遗忘在抽屉里多年的即时成像照片。强烈要求：画面必须是纯粹的风景，绝对不要出现任何人物、人影、手或脸！绝对不要生成任何文字、字母、歌名或水印！保持空灵、孤独和冥想的氛围。",
    "selection_reason": "歌曲整体氛围是62BPM的Lo-fi R&B梦幻感，核心情绪是一个人离开后房间里残留的空白与回声。这种'被抽空的孤独感'最适合用空旷的自然风景来隐喻——雾中静止的湖面如同那间再也等不到人回来的空房间，天水一色的模糊边界呼应了梦境与现实的混沌交融。"
  }
}