{
  "song_id": "02_彩虹_20260420",
  "prompt": "Genre: Mandopop / Choral Ballad; BPM: 137; Key: C major; Rhythm: Slow 4/4 half-time feel. Flowing, arpeggiated piano triplets drive the motion. No percussion.; Instruments: Grand Piano (warm, reverberant, playing rolling arpeggios and supportive chords).; Vocals: Male and Female duet with SATB choir. Natural, emotive, legato phrasing. Large hall reverb creates a vast, angelic texture.; Mood: Watching small town lights blur past from a train window on a long overnight journey.; Production: High-fidelity hall recording. Lush natural reverb, wide stereo choir, smooth high-end polish.; Language: Mandarin; Highlight: The moment the full SATB choir enters on the first \"Ah\" section, swelling from a solo voice into a massive, unified chord of overwhelming warmth.",
  "title": "麦田信",
  "lyrics": "[intro]\n(Chords: Fmaj7 - C/G - Gsus4 - G - C)\n(Mix: Piano centered, wide hall reverb)\n(Inst: Solo piano plays gentle, arpeggiated motif)\n(Melody-Contour: Simple, descending arpeggios)\n\n[verse]\n(Chords: C - G/B - Am - G - F - C/E - Dm7 - G)\n(Vocal-Perf: Gentle female lead, then gentle male lead enters)\n(Mix: Vocals intimate and centered, piano supportive)\n(Inst: Piano continues arpeggios, following vocal melody)\n你寄来一封信\n折痕压过三层\n邮戳上残留的日期\n已是两年前\n我坐在旧木椅\n灯绳拉了又放\n读到第七行停住\n泪落在信笺\n\n[pre-chorus]\n(Chords: F - G - Em - Am - F - G - C)\n(Vocal-Perf: Full SATB choir enters with a powerful dynamic swell, homophonic texture)\n(Mix: Choir fills stereo field, creating immense width and depth)\n(Structure: Dynamic peak, emotional release)\n(Transition: Piano holds sustained chords underneath the choir)\n啊 时光无声\n把所有话语都封存\n啊 你和我\n各自长成了不同\n\n[chorus]\n(Chords: Am - G - F - C - F - C - Dm7 - G)\n(Vocal-Perf: Male and female duet lead, choir provides soft background harmony)\n(Mix: Lead vocals upfront, choir pads create a warm bed)\n(Melody-Harmony: Memorable, stepwise melody)\n(Inst: Piano returns to a more active, arpeggiated role)\n曾并肩坐在田埂上\n数过每一只麻雀\n那时候说好不分开\n却没能做到\n麦穗弯腰向黄昏\n风把话带走了\n\n[verse]\n(Chords: Am - G - F - C - F - C - Dm7 - G)\n(Vocal-Perf: Duet continues, choir harmonies become more prominent and contrapuntal)\n(Mix: Choir and lead vocals are more balanced in the mix)\n(Melody-Dev: Lyrical variation on chorus melody)\n(Transition: Smooth, no break in momentum)\n信末尾只剩一句\n你过得好吗近况\n我拿笔想回又搁下\n不知从何讲\n窗外有人在唤孩子\n回家吃晚饭\n那声音像极了从前\n你妈妈的嗓\n\n[bridge]\n(Chords: C - G/B - Am - G - F - C/E - G - C)\n(Vocal-Perf: Full choir humming a new, nostalgic melody, wordless 'oohs' and 'aahs')\n(Mix: Piano drops back, focus is entirely on the choral texture)\n(Structure: Quieter, reflective interlude)\n(Sound-Design: The pure sound of the choir in the hall reverb)\n\n[chorus]\n(Chords: Am - G - F - C - F - C - Dm7 - G)\n(Vocal-Perf: Full SATB choir sings melody in unison and harmony, powerful and climactic)\n(Mix: Maximum dynamic level, choir is dominant, powerful and full)\n(Inst: Piano plays strong, supportive block chords)\n(Structure: Final emotional peak of the song)\n曾并肩坐在田埂上\n数过每一只麻雀\n那时候说好不分开\n却没能做到\n麦穗弯腰向黄昏\n风把话带走了\n\n[outro]\n(Chords: F - G - C - Am - Dm7 - G - C)\n(Vocal-Perf: Choir shifts to soft 'lala' countermelodies, duet sings final lines tenderly)\n(Mix: Begins to fade, reverb tails become more noticeable)\n(Structure: Decrescendo to a quiet close)\n(Transition: Piano plays a final, sparse arpeggio and fades to silence)\n麦穗弯腰向黄昏\n风把话带走了\n麦穗弯腰向黄昏\n风把话带走了",
  "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：一片弯曲的麦穗轮廓，边缘在浅米色湿润纸面上自然晕散，穗梗向画面右下方倾斜，背景从暖米黄色过渡至灰白，仿佛正午后的田野光线渐渐退入傍晚的温柔。\n\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\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": "一片弯曲的麦穗轮廓，边缘在浅米色湿润纸面上自然晕散，穗梗向画面右下方倾斜，背景从暖米黄色过渡至灰白，仿佛正午后的田野光线渐渐退入傍晚的温柔"
  }
}