{
  "song_id": "03_琵琶曲（东船与西舫）_20260716",
  "prompt": "Genre: Mandopop / EDM / Guofeng; BPM: 109; Key: A Major; Rhythm: Mid-tempo electronic beat; snare on 2&4; trap-influenced 16th-note hi-hats; on-the-grid.; Instruments: Sampled Pipa (sharp attack); Guzheng plucks; deep sub-bass; punchy 808-style kick & snare/clap; crisp hi-hats; arpeggiated synth pluck.; Vocals: Male and Female duet. Male: polished mid-range tenor, modern C-pop style. Female: high-register traditional opera style (Xiqiang), ethereal reverb.; Melody: Narrow range, stepwise; phrases land on tonic/dominant; on-the-beat.; Mood: Scrolling old phone photos while a historical drama plays silently on a screen.; Production: Polished, radio-ready; powerful low-end; wide stereo image; heavy master bus compression.; Language: Chinese; Highlight: The sudden entry of the high, reverb-soaked female opera vocal over the intro synth pad, before the main beat drops.",
  "title": "候鸟书",
  "lyrics": "[intro]\n(Mix: Polished, radio-ready fidelity. Punchy, centered low-end from sub-bass and kick. Clear mid-range for vocals and Pipa. Wide stereo field with synth arps and FX panned. Heavy master bus compression for loudness and glue. Female vocal has a vast, long-decay reverb.)\n(Inst: Swelling synth pad, solo Pipa sample playing main melodic motif, distant female opera vocal.)\n(Hook-DNA: Rhythmic pattern: dotted-eighth + sixteenth on beats 1 and 3; Pitch anchor: circles the 5th, resolves to tonic at phrase end; Repetition: motif repeats twice, second statement rises a step.)\n(Transition: Vocal reverb tail fades into a subtle synth riser, leading into the beat.)\n候鸟穿云去 衔走了谁的名字\n\n[verse]\n(Melody-Contour: Narrow range, stepwise motion; phrases land on chord tones; conversational rhythm.)\n(Vocal-Perf: Male vocal is relaxed, soft chest voice, mezzo-piano, very upfront and dry.)\n(Inst: Full electronic beat enters with punchy kick, layered snare/clap, and fast hi-hats. Sub-bass follows the chords. Pipa plays counter-melodies.)\n(Chords: F#m - D - A - E)\n(Transition: A brief pause in the drums before a snare fill pushes into the chorus.)\n信封压在箱底三年整\n你走前说等 我没敢问等多久\n窗台的茉莉 开了又落了两轮\n剩一盆空土 装满问你的话没出口\n\n[chorus]\n(Melody-Contour: Ascending arch in first half, reaching a higher register; stepwise descent in the second half to resolve.)\n(Melody-Harmonic-Tension: Melody builds on unresolved tension in the upper register before snapping back to the root, like a rubber band pulled taut then released.)\n(Hook-Recall: The lead Pipa melody doubles the vocal hook exactly, reinforcing the core rhythmic and melodic motif from the intro.)\n(Vocal-Perf: Male vocal becomes more powerful, open, and sustained; mezzo-forte delivery.)\n(Inst: Harmonic texture thickens with layered synth pads. Pipa is more prominent.)\n(Chords: F#m - D - A - E)\n(Mix: Stereo image widens with vocal harmonies and synth pads panned out.)\n(Transition: A reverse cymbal swell and low-pass filter sweep create a smooth fall in energy.)\n我在候鸟飞过的站台等\n风把月台的灯吹得直颤\n你的方向 始终差我一个季节\n偏偏最后一班车 不朝南边\n\n[verse]\n(Melody-Contour: Returns to the narrower range and conversational feel of the first verse.)\n(Vocal-Perf: Male vocal softens again, creating dynamic contrast with the chorus.)\n(Inst: The beat simplifies, with a less busy hi-hat pattern. Sub-bass is more prominent in the mix.)\n(Chords: F#m - D - A - E)\n(Transition: All instruments drop out for one beat, leaving a hanging synth note that pulls into the bridge.)\n手机屏幕亮过一次就灭\n不是你 是外卖到了门边\n我学着把你的字体临摹\n写到第五页 才发现不像你的倔\n\n[bridge]\n(Melody-Contour: Ascends to the highest register yet; phrases are longer and more sustained, building tension.)\n(Melody-Harmonic-Tension: Melody holds the 2nd over the tonic chord for a full beat in each phrase, creating a prominent sus2 tension that begs for the resolution of the chorus.)\n(Vocal-Perf: Delivery becomes more emotional and strained, with a crescendo in volume.)\n(Inst: A driving 16th-note hi-hat roll is added. A subtle riser synth builds in the background.)\n(Chords: D - E - F#m - A)\n(Mix: Reverb on the lead vocal increases, making it sound larger and more epic.)\n(Transition: A fast, powerful drum fill with cymbal crashes explodes into the final chorus.)\n候鸟年年回 你却没有候鸟的规律\n我把你寄出去的那封信拆开\n墨水洇成一片 读不出哪个字\n只剩信纸折痕 证明你认真叠过它\n\n[chorus]\n(Melody-Contour: Same powerful ascending arch as the first chorus, providing the emotional peak of the song.)\n(Melody-Harmonic-Tension: The resolving melody lands with full weight on the tonic, delivering the emotional payoff the entire song has been reaching toward.)\n(Hook-Recall: The Pipa hook is layered with a synth lead for maximum impact. Distant female opera ad-libs return.)\n(Vocal-Perf: Full-power, belted delivery. Passionate ad-libs in the background.)\n(Inst: All instrumental layers are present and at their most intense.)\n(Chords: F#m - D - A - E)\n(Mix: The mix is at its widest and loudest. Sidechain compression on pads from the kick is more pronounced.)\n(Transition: Abrupt cutoff of all instruments at the end of the final line, leaving only the reverb tail of the Pipa and vocal.)\n我在候鸟飞过的站台等\n风把月台的灯吹得直颤\n你的方向 始终差我一个季节\n这一次开口 已经不知道朝哪边\n\n[outro]\n(Inst: The electronic beat is gone. Only the solo Pipa melody remains, playing over a soft, fading synth pad.)\n(Mix: A rapid fade-out to silence.)",
  "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：一道边缘自然晕散的弧形墨痕，如同候鸟掠过宣纸时留下的飞翔轨迹，孤悬于大面积灰白留白之中；弧线末端墨色渐淡，像一个被时间稀释的句子，说到一半就断了；背景带有轻微水渍痕迹与手工纸纤维感，色调冷灰偏蓝，透出一种旷野车站月台边的寂静与等待。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。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": "一道边缘自然晕散的弧形墨痕，如同候鸟掠过宣纸时留下的飞翔轨迹，孤悬于大面积灰白留白之中；弧线末端墨色渐淡，像一个被时间稀释的句子说到一半就断了；背景带有轻微水渍痕迹与手工纸纤维感，色调冷灰偏蓝，透出一种旷野车站月台边的寂静与等待"
  },
  "_craft": {
    "total": 79.0,
    "passed": true,
    "dims": {
      "意象": 17,
      "韵脚": 14,
      "叙事弧": 17,
      "hook": 16,
      "可唱性": 15
    },
    "verdict": "这是一首有真实创作意图的作品，意象密度和叙事结构均在市场平均线之上，但韵脚散漫和bridge可唱性危机是送进录音棚前必须解决的硬伤，否则再好的制作方案都会在演唱层卡死。",
    "worst_lines": [
      {
        "line": "我把你寄出去的那封信拆开",
        "why": "十四字塞入一个乐句，介词结构「寄出去的那封」臃肿，旋律上行时字头辅音堆叠，演唱几乎无法自然断句，是全篇可唱性最低的一行",
        "fix": "压缩结构，保留动作核心：「那封信我终于拆开」或「我把那封信拆开」，删去「寄出去的」这个冗余状语"
      },
      {
        "line": "只剩信纸折痕 证明你认真叠过它",
        "why": "「叠过它」的「它」字轻声虚词收尾，置于全曲情绪最高点前的bridge末句，情感重量严重不足，且「认真叠过它」口语化过头与前半句「信纸折痕」的诗意质感割裂",
        "fix": "将收尾落在实词意象上：「只剩信纸折痕 一道一道都是你」，或「折痕还在 你的手温不在了」，用缺席感替代动作描述"
      },
      {
        "line": "写到第五页 才发现不像你的倔",
        "why": "「倔」字在粤语及普通话歌曲中押韵难度极高（ue韵），且「临摹字体」→「临摹出倔劲」的逻辑跳跃略显刻意，「你的倔」作为抽象性格词在此缺乏前文铺垫，稍显空洞",
        "fix": "将「倔」落实为可感知的书写细节：「写到第五页 才发现你的力道不像我」，或换韵脚方向：「写到第五页 笔划开始像你却不像你说的再见」"
      }
    ],
    "rounds": 0,
    "history": [
      {
        "round": 0,
        "total": 79.0,
        "verdict": "这是一首有真实创作意图的作品，意象密度和叙事结构均在市场平均线之上，但韵脚散漫和bridge可唱性危机是送进录音棚前必须解决的硬伤，否则再好的制作方案都会在演唱层卡死。"
      }
    ],
    "model": "claude-sonnet-4-6"
  }
}