让 AI 写 boom-bap，难点不在押韵密度，难在让它真的不跑成现代 trap。模型默认就是 trap flow + “努力 / 兄弟”那一套空话，哪怕你写了 boom-bap 它也会跑偏。要让它写出 90 年代东岸那种味道，得明确直拍 Flow、多音节内韵、留拍位、年代特定意象库。下面给出 10 套可直接复制的 Prompt 模板，每套对应一个具体的 boom-bap 子方向。
这类歌词的结构是怎样的
一段 boom-bap verse 即便听起来松弛，骨架其实很紧：
- Intro tag：一句标志短语，可选 ad-lib
- Bars 1-4：建立场景，地面层意象
- Bars 5-8：押韵密度上升，第一个多音节韵出现
- Bars 9-12：叙事推进或 punchline 段
- Bars 13-16：payoff bar，通常是最聪明的 wordplay
- Outro line：安静的观察、反转、或 callback
- 可选 hook：sample-friendly，2-4 bar
- 可选 bridge：half-time 切换，2-4 bar 反差意象
把这个结构写进 Prompt，模型就不会滑回 trap。
一个好 Prompt 通常包含什么
- 主题 —— 不写”街头”，要写”Bed-Stuy 1994 年夏天，街角消防栓被打开”
- 结构 —— Bar 数、intro/hook 布局
- 副歌 / Hook 约束 —— sample-friendly，1 意象 + 1 动作（适用时）
- 禁止词 —— “努力 / 奋斗 / 到顶 / 兄弟 / 没人相信我”
- 押韵 —— 多音节、内韵、跨句韵；不允许长串句尾押
- 语气 —— 粗粝、电影感、对话感、爵士采样气质
- 每段长度 —— Verse 16 bar、Hook 4 bar、Bridge 2-4 bar
10 个可直接复制的 Prompt 模板
1. 黄金时代 90 年代纽约街头叙事
使用场景：复古 EP、纽约纪录片配乐、黄金时代歌单。
Write a 16-bar boom-bap rap verse in English.
Theme: a Bed-Stuy summer 1994 street narrative; fire hydrant open on the corner, kids on the stoop.
Flow: straight, no triplets, 90s East Coast cadence; leave space between phrases for the snare.
Rhyme: multi-syllabic internal rhymes, cross-bar rhymes; no stacked end-rhymes over 4 bars.
Imagery: at least one concrete object every 2 bars (Timberlands, payphone, brown paper bag, deli awning).
Forbidden: "the grind", "made it", "to the top", "haters", "nobody believed".
End the final 4 bars with a quiet observation, not a brag.2. Wu-Tang 式电影感团队拼盘
使用场景：crew posse cut、武侠采样曲、团队 mixtape。
Write a 16-bar boom-bap verse in English in the style of a 5-member crew posse cut.
Theme: late-night meet-up on a Staten Island ferry; the city is half-asleep.
Flow: straight, slightly off-kilter; allow one bar of half-time near bar 10.
Rhyme: dense multi-syllabic internal rhymes, frequent enjambment between bars.
Imagery: cinematic, almost cinematic-fight-scene level detail (chess pieces, ferry railing, neon Chinatown sign).
Forbidden: "we run this", "kings of the city", "respect the throne".
End with a sharp callback to bar 1's imagery.3. 地下室 cypher 即兴
使用场景：cypher mixtape、深夜电台节目、毛糙录音棚剪辑。
Write a 16-bar boom-bap freestyle-style verse in English.
Theme: a basement cypher with one mic passed around; the freestyle is your first turn.
Flow: straight, conversational; rhythm slightly behind the beat to feel "in the pocket".
Rhyme: rolling internal rhymes; rhyme chains spanning 4 bars; no stacked end-rhymes.
Imagery: basement details (folding chair, blunt smoke, single bulb, cracked mic) + one neighborhood object per 4 bars.
Forbidden: "freestyle king", "off the dome", "best to ever do it", any superlative brag.
End with a self-aware line that acknowledges you are still warming up.4. 90 年代中期东岸硬派
使用场景：硬派单曲、粗粝 mixtape、黑胶风格发行。
Write a 16-bar mid-90s East Coast hardcore boom-bap verse in English.
Theme: returning to the block after one year away; everyone you knew is on a different path.
Flow: straight, heavy on the downbeat; allow one bar of double-time at bar 12.
Rhyme: aggressive multi-syllabic rhymes, cross-bar chains; one punchline every 4 bars.
Imagery: concrete street objects (corner bodega awning, scratched train window, busted intercom).
Forbidden: "the streets raised me", "blood on my hands" (unless metaphorical and earned), "real ones know".
End with a single observation about a person who is no longer around.5. 爵士采样叙事 MC
使用场景：爵士采样专辑选曲、烟雾酒吧配乐、深夜纪录片。
Write a 16-bar jazz-sampled boom-bap verse in English.
Theme: an aging jazz musician you used to deliver groceries to; he taught you how to listen.
Flow: straight, slightly behind the beat; long lines with internal pauses.
Rhyme: multi-syllabic internal rhymes spread across 4-bar groups; let some bars rhyme only internally.
Imagery: jazz-era details (vinyl sleeve, brass mute, ashtray, hallway radiator).
Forbidden: any superlative; any reference to your own greatness.
End with the musician saying one short line to you.6. Boom-Bap Battle Bar
使用场景：Battle 联盟登场、diss 单曲、mixtape 加曲。
Write a 16-bar boom-bap battle verse in English.
Theme: dissing a fictional rival who claims to represent the borough but moved to the suburbs.
Flow: straight, in-the-pocket; never trap, never triplet.
Rhyme: dense multi-syllabic chains; one punchline every 2 bars using metaphor or wordplay.
Imagery: borough-specific objects (subway grate, dollar slice, brownstone steps) contrasted with suburban objects (riding mower, cul-de-sac, two-car garage).
Forbidden: slurs, real names, threats of physical violence; punchlines must be wordplay.
End with a punchline that uses a literal piece of suburban imagery as the dagger.7. 政治意识黄金时代
使用场景：政治主题单曲、纪录片配乐、嘻哈历史合集。
Write a 16-bar conscious boom-bap verse in English.
Theme: rent has tripled on the block you grew up on; you walk past your old building.
Flow: straight, slow, deliberate; pauses between phrases.
Rhyme: multi-syllabic internal rhymes only; avoid all end-rhyme stacks.
Imagery: concrete neighborhood-change details (new cafe sign, scaffolding, old man who is still on the stoop, mailbox with someone else's name).
Forbidden: any slogan, any political party reference, any chant; let the imagery do the politics.
End with the old man saying one short line.8. 西岸 G-funk 撞东岸 Boom-Bap
使用场景：跨海岸单曲、跨时代歌单、融合 mixtape。
Write a 16-bar verse in English that fuses West Coast G-funk with East Coast boom-bap.
Theme: a road trip from LA to Brooklyn told in reverse.
Flow: straight with one bar of half-time per 4-bar group; East Coast cadence dominates.
Rhyme: multi-syllabic internal rhymes; cross-bar chains; one punchline every 4 bars.
Imagery: split between West Coast (palm shadow, lowrider hydraulics, In-N-Out cup) and East Coast (subway grate, deli awning, brown paper bag).
Forbidden: "coast to coast", "from the West to the East", "two coasts one love".
End with a quiet observation about which coast you actually miss.9. 女 MC 主体 boom-bap
使用场景：女性力量单曲、嘻哈历史合作曲、黄金时代致敬。
Write a 16-bar female-perspective boom-bap verse in English.
Theme: stepping into a male-dominated cypher in 1996 and waiting your turn.
Flow: straight, confident, in-the-pocket; never sing-rap, never trap.
Rhyme: dense multi-syllabic rhymes; one punchline every 4 bars; rhyme chains across bars.
Imagery: cypher details (folding chair, smoke, side-eyes, one mic) + one personal object (hair clip, ringed notebook, ticket stub).
Forbidden: "queen of the game", "the only girl in the room", any slogan; show power through observation.
End with the line you finally drop when the mic comes to you.10. 2020 年代 boom-bap 复兴
使用场景：当代复古单曲、独立嘻哈发行、黑胶再版系列。
Write a 16-bar modern boom-bap revival verse in English.
Theme: a 2020s artist working in a 90s style on purpose; reckoning with whether revival is honest.
Flow: straight, slightly behind the beat; no triplets; sample-friendly phrasing.
Rhyme: multi-syllabic internal rhymes; rhyme chains across 4 bars; one self-aware punchline mid-verse.
Imagery: contemporary objects (laptop sampler, vintage drum machine, streaming royalty notice) cross-cut with 90s objects (cassette case, payphone).
Forbidden: "real hip-hop", "back to the roots", "save the culture"; show authenticity through small detail.
End with a line that questions whether you are honest or imitating.容易踩的坑
- 写了 boom-bap 还是跑成 trap —— 在 Prompt 加 “no triplets, no trap, straight cadence”，负向指令才有用
- 6 句以上句尾全押同一个字 —— 强制 “internal rhyme + cross-bar rhyme，最多两句叠押”
- 意象太空（“街头 / 街角”）—— 给一个具体街区和年份，并列 2-3 个具体物件
- 没写禁止词 —— “the grind” 和 “made it” 8 bar 之内就会冒出来
- 没写”最后一句要求” —— boom-bap 的结尾观察一旦丢失，整段没收束
下一步怎么改得更好
- 同一 Prompt 跑 3 次不同 cadence（in-the-pocket / behind-the-beat / slightly ahead），选呼吸最舒服那版
- 把 verse 里所有 punchline 单独拎出来读，少于 3 个就重生成中段 8 bar
- 每 4 bar 加一个年代特征物（Walkman、payphone、MetroCard 蓝条原版）—— 精度决定味道
- 按 88-95 BPM 读一遍，音节卡顿就让模型每句砍 1-2 个音节
- 复兴向的 Prompt 强制每段加一句”自觉性”的句子，避免变成 cosplay
常见问答 (FAQ)
Q：写了 boom-bap，模型还是跑成 trap 怎么办？ A：加负向指令：“no triplets, no trap, no double-time except where specified, straight cadence.” boom-bap 这个词太弱，得靠”禁止”才稳。
Q：意象写出来还是像普通 90 年代电影？ A：“the block / the streets / the corner” 都是空词。指定具体街区、年份和 2-3 个具体物件（deli 招牌牌子、payphone 颜色、地铁线编号），精度自带年代感。
Q：怎么让 punchline 真的出彩？ A：在 Prompt 末尾单独写一条：“One punchline every 4 bars using metaphor or wordplay; never direct insult, never literal flex.” 命中率会高很多。
Q：怎么让 cadence 留出空给制作人摆鼓？ A：用 “leave space between phrases for the snare” 或 “sample-friendly cadence with pauses on the 2 and 4”，模型会自动调整句长和呼吸。
Q：同一个 Prompt 能既写 90 年代东岸也写 2020 年代复兴吗？ A：可以，但意象库要换，复兴版本要强制加一句”自觉性”的句子。90 年代靠 payphone/MetroCard/deli；复兴加 laptop sampler 和一句质疑诚实度的话。