{
  "song_id": "02_Lucky_20260419",
  "prompt": "Genre: Acoustic Pop, Singer-Songwriter; BPM: 130; Key: G Major; Rhythm: Light, mid-tempo shuffle with a gentle swing feel and driving pocket syncopation, carried by brushed snare and a consistent acoustic guitar strum.; Instruments: Steel-string acoustic; close-mic'd, fret noise., Warm electric bass; round tone, root notes., Light drum kit; brushed snare; Vocals: Male and Female duet; intimate close-mic male tenor and airy female alto, harmonizing with natural, light processing.; Mood: The warm sun on your skin on a quiet beach, knowing you're about to see someone you've missed for a long time.; Production: High-Fidelity, Pristine Radio-Ready Mix with expensive analogue warmth and silky smooth high-end. Vocals are centered and upfront, with a transparent, smooth compression style.; Highlight: The moment the female vocal joins the male in harmony on the final word of the pre-chorus, immediately followed by the entrance of the full drum groove on the downbeat of the chorus.",
  "title": "Porch Light On",
  "lyrics": "[verse]\n(Inst: Single acoustic guitar, gentle fingerpicking, sparse.)\n(Vocal-Perf: Male tenor, soft, conversational, close-mic'd.)\n(Mix: Intimate, dry, vocal-forward mix. Centered mono feel. Acoustic guitar panned slightly right. Smooth transparent compression. High-Fidelity, Pristine Radio-Ready Mix with expensive analogue warmth and silky smooth high-end.)\n(Melody-Contour: Descending phrases, narrow melodic range, staying within a perfect 4th.)\n(Melody-Rhythm: Relaxed phrasing, starting on the upbeat of 1, syncopated against the steady guitar.)\n(Chords: G - D - Em - C)\nYour jacket's on my kitchen chair\nI left it folded, still just there\nThe coffee mug you picked in June\nstill sits beside my afternoon\n\n[pre-chorus]\n(Transition: Female vocal enters seamlessly as guitar moves to a light strum.)\n(Inst: Acoustic guitar strum becomes more rhythmic, building momentum.)\n(Vocal-Perf: Female alto enters, airy and warm. Builds to a duet harmony on the final line.)\n(Melody-Contour: Ascending melodic line, creating tension that pulls towards the chorus.)\n(Chords: G - D - Em - C)\nI keep the porch light burning low\nFor every night I don't quite know\nIf you'll come drifting back around\nAnd find your footing on this ground\n\n[chorus]\n(Inst: Full band enters; brushed snare, round electric bass, layered strummed acoustics.)\n(Vocal-Perf: Duet harmony throughout, more dynamic and open, full-chest resonance.)\n(Mix: Stereo image widens significantly. Drums and bass fill out the low-mid frequencies.)\n(Hook-DNA: Core motif is a descending pentatonic scale phrase; rhythmic pattern is two eighths + quarter note on the downbeat; repeats twice, third phrase extends upward.)\n(Melody-Contour: Signature arch-shaped melody with a satisfying P4 leap from the 5th to the root on the hook.)\n(Melody-Rhythm: Phrases start consistently on the 'and' of beat 4, creating a feeling of leaning into the next bar.)\n(Melody-Harmonic-Tension: Primarily consonant, using chord tones for a satisfying, resolute feel. Brief tension from a passing 9th over the root chord in the second line.)\n(Chords: G - D - Em - C)\nThere's a spare key under the stone\nSo you always have a way back home\nWherever you've gone, whatever you've grown\n\n[verse]\n(Inst: Band dynamics pull back slightly, bass line becomes more melodic and contrapuntal.)\n(Vocal-Perf: Call-and-response duet, trading short, rhythmic lines.)\n(Melody-Contour: Lower vocal register, flatter and more conversational contour than the chorus.)\n(Melody-Rhythm: Fast, syncopated 16th-note phrasing creating a playful, rhythmic pocket.)\n(Chords: C - G - Am - G - D)\nI saw your handwriting on the wall\nBeside the height marks, five years tall\nWe mapped the seasons on that door\nWinter thaw and summer shore\nThe dust still settles where you used to sprawl\n\n[bridge]\n(Inst: Drums drop out, then re-enter with a soft groove. Lush string pads enter, swelling underneath. Acoustic guitar returns to arpeggios.)\n(Vocal-Perf: Male lead starts, joined by close female harmony. Notes are more sustained and emotive.)\n(Melody-Contour: A long, steadily ascending line that builds to the highest melodic point of the song.)\n(Melody-Harmonic-Tension: Melody holds the 2nd over the tonic chord for two full beats in each phrase, creating a gentle, anticipatory tension that resolves just before the chorus re-enters.)\n(Chords: C - G - D - G | C - G - Em - D)\nTime moves like sap through an old oak tree\nSlow and amber, sweet and free\nI pressed your letters flat and dry\nBetween the pages, so they'd never die\n\n[chorus]\n(Inst: Fullest arrangement. Strings are now a prominent melodic layer. Rhythm section drives with more energy.)\n(Vocal-Perf: Most powerful duet performance, featuring subtle ad-libs and higher harmonies.)\n(Mix: Widest stereo field, most dynamic range, parallel compression on vocals for punch.)\n(Hook-DNA: Core motif is a descending pentatonic scale phrase; rhythmic pattern is two eighths + quarter note on the downbeat; repeats twice, third phrase extends upward.)\n(Melody-Contour: Signature arch-shaped melody with a satisfying P4 leap from the 5th to the root on the hook.)\n(Melody-Rhythm: Phrases start consistently on the 'and' of beat 4, creating a feeling of leaning into the next bar.)\n(Melody-Harmonic-Tension: Primarily consonant, using chord tones for a satisfying, resolute feel. Brief tension from a passing 9th over the root chord in the second line.)\n(Chords: G - D - Em - C)\nThere's a spare key under the stone\nSo you always have a way back home\nWherever you've gone, whatever you've grown\nThe door still swings on the same old hinge\nThe floorboard creaks at the hallway's fringe\nYou'll find it all just as you've known\n\n[outro]\n(Inst: Instruments fade out one by one, leaving layered vocal harmonies and a final acoustic guitar strum.)\n(Vocal-Perf: Wordless, intertwining 'ooh' and 'aah' harmonies.)\n(Mix: Reverb and delay tails become prominent as the arrangement thins out.)\n(Sound-Design: Final acoustic chord rings out with natural string decay.)\nCome on home, come on home\nWherever the road bends, you're not alone\nThe key is waiting underneath the stone",
  "cover_prompt": "生成一张极简主义的几何光影艺术图片作为无字音乐专辑封面。画面的核心是：一把细小的铜钥匙轮廓，边缘柔和模糊，半透明地悬浮于从温暖琥珀色到浅沙米色的水彩渐变背景之中，背景隐约透出一扇窗框的几何剪影，线条极度克制。画面必须展现出微妙的高级材质肌理，特别是类似水彩晕染（Watercolor texture）或粗糙艺术纸张的触感。整体构图极度克制、留白（Minimalistic composition），注重光与影的柔和交错（Light and shadow interplay）。强烈要求：画面必须保持极致的安宁与静谧（Calm and serene），除了基础的、柔焦的简单几何图形（如模糊的圆、半透明的方块或柔和的线条）外，绝对不要出现任何复杂的现实物体、风景或人物！画面必须是无字封面，绝对不要生成任何文字、拼音或英文字母！绝对不要生成人物轮廓。传达出一种充满诗意、呼吸感与冥想空间的视觉感受。",
  "cover": {
    "template_id": 2,
    "template_name": "几何光影艺术流",
    "scene_description": "一把细小的铜钥匙轮廓，边缘柔和模糊，半透明地悬浮于从温暖琥珀色到浅沙米色的水彩渐变背景之中，背景隐约透出一扇窗框的几何剪影，线条极度克制，整体传递出等待与归属感交织的温柔情绪。"
  },
  "style_direction": "B",
  "style_reference": "Taylor Swift, Olivia Rodrigo"
}