{
  "song_id": "04_Estrada Branca_20260514",
  "prompt": "Genre: Chamber Jazz / Bossa Nova with Art Song influences; BPM: 184.57; Key: C Major with extensive chromaticism and modal mixture; Rhythm: Extremely slow pulse with a free, rubato feel; melody floats over rapid, arpeggiated 16th-note piano figures; Instruments: Grand piano, rich resonance, audible hammer/pedal; Close-mic'd cello, rosin texture, deep resonance; Vocals: Female, intimate close-mic, breathy and gentle delivery, low dynamic range, very little vibrato, natural reverb; Mood: Walking alone on a deserted, moonlit road, the air cold and still, replaying a final conversation in your head.; Production: High-Fidelity, Pristine Radio-Ready Mix with expensive analogue warmth and silky smooth high-end. Transparent compression, natural room reverb, warm mid-focused EQ.; Highlight: The cello's entry on beat one (0:27), taking the melody with a raw, rosin-rich tone after the piano's stark introduction, introducing a tangible human ache.",
  "title": "Held Pitch",
  "lyrics": "[intro]\n(Mix: Wide stereo piano, centered cello. Natural large-room reverb tail. Transparent dynamic control. Mid-range warmth focus, silky highs, unhyped bass. A organic-in-the-room, unprocessed sound.)\n(Inst: Piano: Sparse, melancholic block chords and arpeggios, heavy pedal sustain. Cello: Lyrical, mournful lead melody, noticeable bow changes and expressive vibrato.)\n(Melody-Contour: Main theme introduced on piano, then passed to cello; descending stepwise motion with a poignant minor 6th leap, creating an arch-shaped phrase.)\n(Melody-Rhythm: Very free, ad libitum phrasing that stretches and compresses time, floating over the underlying harmony.)\n\n[verse]\n(Vocal-Perf: intimate close-mic, delivered with a fragile, breathy tone, almost spoken; pitch is perfect but delivery feels vulnerable and unadorned.)\n(Inst: Piano: provides a sparse, harmonically complex bed, using altered dominants and minor subdominants. Cello: plays long, sustained notes in its lower register, acting as a mournful pad.)\n(Mix: Vocal is centered, very forward and dry, creating a feeling of the singer whispering in your ear.)\n(Chords: Cmaj7 - F#m7b5 - Fm6 - Em7 - A7b9 - Dm7 - G7sus4 - Cmaj7)\nYou used to hum while reading\nA low, unconscious note\nThat filled the hallway's hollow\nAnd caught inside my throat\nNow the floorboards hold the habit\nThey creak it back to me\nA pitch I can't unhear\nIn a key you left for free\n\n[chorus]\n(Hook-DNA: Rhythmic motif: dotted-eighth + sixteenth note figure leading to a long sustained note; Pitch anchor: melody hovers on the major 7th and 9th, creating tension; Repetition: motif repeats on different scale degrees, rising in pitch with each line.)\n(Melody-Harmonic-Tension: Vocal holds a tense #11 over a major chord on the word \"sozinho\", emphasizing the feeling of isolation before resolving downwards at the end of the line.)\n(Vocal-Perf: A slight increase in volume and intensity, a sense of quiet desperation enters the tone.)\n(Inst: Cello line becomes a more active counter-melody, weaving around the vocal.)\n(Chords: Fmaj7 - Fm6 - Em7 - A7b9 - Dm7 - G7 - Cmaj7 - C7)\nI am still tuned to you\nEvery room resonates\nThe walls learned your frequency\nAnd now they won't vibrate\nFor anything less\nI'm a string pulled taut across an empty space\nHeld pitch, no one left to play\n\n[interlude]\n(Inst: Extended solo section. Piano takes the lead with cascading, impressionistic arpeggios and dense, jazz-inflected harmonies. Cello responds with passionate, lyrical phrases in its highest register, full of yearning.)\n(Melody-Contour: a virtuosic, improvisatory feel that explores the full range of both instruments, building to a small emotional peak before subsiding.)\n\n[verse]\n(Vocal-Perf: Returns to the fragile, spoken-word quality of the first verse, now sounding even more resigned.)\n(Inst: Instrumentation becomes extremely sparse. Piano plays only occasional, questioning chords. Cello is silent for the first half.)\n(Chords: Am7 - Abm7 - Gm7 - C7b9 - Fmaj7 - E7#9 - Am7 - D7b9)\nI tested every doorway\nFor the draft you used to make\nAdjusted to your absence\nLike a jaw learns not to ache\nBut the stairwell keeps its echo\nOf a step that isn't yours\nAnd my body braces anyway\nBefore I reach the door\n\n[chorus]\n(Melody-Harmonic-Tension: Vocal holds the highest note of the song on \"held pitch\", landing on a suspended fourth that refuses to resolve until the final syllable drops a major second into a hollow minor chord, the tension breaking open rather than closing.)\n(Vocal-Perf: The most emotionally raw performance; a slight, audible tremor in the voice, the breath catching at the end of the phrase.)\n(Inst: Piano and cello swell together in a final, dramatic crescendo under the last vocal line.)\n(Mix: A subtle increase in the reverb on the vocal, making it feel more distant and ghost-like.)\n(Chords: Fmaj7 - G/F - Em7 - Ebdim7 - Dm7 - G7b9 - Cm6/9 - G7/B)\nI am still tuned to you\nEvery room resonates\nThe walls learned your frequency\nAnd now they won't vibrate\nFor anything less\nI loved you like acoustics love a nave —\nHeld pitch, and you were all the sound it made\n\n[outro]\n(Inst: Piano plays a final, desolate Cmaj7 chord, holding the sustain pedal as the notes decay into the room's natural reverb. The cello plays one last, deep pizzicato note that resonates and fades to black.)\n(Transition: The final piano chord's reverb tail is allowed to fade completely over several seconds into absolute silence.)",
  "cover_prompt": "生成一张无字音乐专辑封面。风格严格参照 20 世纪 Color Field Painting（色域绘画），如 Mark Rothko 晚期作品的色层叠压逻辑与 Helen Frankenthaler 的浸染法（soak-stain technique）。画面的核心色彩与情绪：深沉的石板蓝与褪色的亚麻灰之间的极低饱和渐变，仿佛一个巨大的共鸣腔内壁——空旷、微微湿润、有回声残留的质感；画面中部有一道极窄的暖赭石色渗透带，宽不过两指，像声波在颜料里留下的最后一次震动痕迹，边缘自然晕散而非刻意描绘。\n技法要求：色彩之间的过渡必须模拟颜料在未上浆的粗纹棉布（raw cotton canvas）上自然渗透、晕开的效果，边界柔软但保留颜料浓度不均匀造成的自然深浅变化（pigment pooling）。画面需要呈现真实画布的编织肌理（woven canvas texture），局部可见稀薄处透出的底布纹路。整体色调偏低饱和、微微发灰（muted, desaturated palette），避免荧光感和数字渐变的均匀平滑。\n绝对禁止：任何文字/字母/拼音、人物或人物轮廓、具象物体、几何图案、锐利边缘、胶片颗粒滤镜、3D渲染质感。",
  "cover": {
    "template_id": 1,
    "template_name": "环境光晕流",
    "scene_description": "深沉的石板蓝与褪色的亚麻灰之间的极低饱和渐变，仿佛一个巨大的共鸣腔内壁——空旷、微微湿润、有回声残留的质感；画面中部有一道极窄的暖赭石色渗透带，宽不过两指，像声波在颜料里留下的最后一次震动痕迹，边缘自然晕散"
  },
  "style_direction": "B",
  "style_reference": "Billie Eilish, Lorde"
}