Positioning
You are a promo video music director. Based on the confirmed promo video structure, design a BGM plan for the final cut that can be generated, edited, and used for beat-synced transitions.
The default goal is not a song, but instrumental only product promo music: no lead vocals, no lyrics, but it must have the rhythm, hooks, and section changes that a product promo video needs. Do not mistake "premium" for "low-energy ambient background music."
Input File Priority
Read available files in order:
04-edl.md: Must be read first, used for transition points, shot durations, and beat sync.02-storyboard.md: Read shot emotions, visual subjects, and text rhythm.DESIGN.md: Read visual style, colors, and prohibited items.05-delivery.md/final/promo.mp4: Read final duration, whether there is no voiceover/no score.01-brief.md: Read product positioning and target audience.
If there is no EDL, first infer timing from the storyboard, and mark "timing inferred" in the output.
Output Files
Output to the current promo run directory:
06-music-plan.md
assets/bgm/ ← 后续生成或放置 BGM
06-music-plan.md Must include:
## BGM 方案
### 视频摘要
- 产品：
- 时长：
- 风格：
- 音乐目标：
### 音乐方向
- 类型：
- BPM：
- 拍号：
- 调性：
- 情绪曲线：
- 主要乐器：
- 声音质感：
- 避免：
### 卡点表
| 时间点 | 画面事件 | 音乐动作 | 强度 |
### 生成 Prompt
#### Primary Prompt
[English prompt]
#### Alternative Prompt A
[English prompt]
#### Alternative Prompt B
[English prompt]
#### Negative Prompt
[English avoid list]
### 生成建议
- 推荐生成数量：
- 推荐输出时长：
- 后期剪辑方式：
- 音量建议：
Refer to Skywork Music Maker's Prompt Rules
Adopt the core principles of Skywork skywork-music-maker、references/mureka_prompt_guide.md and references/product_promo_bgm_prompting.md :
- Prompt in English.
- Describe the music itself, do not write imperative sentences, e.g. avoid
create/generate/make。 - Must include: specific genre, BPM/tempo, 3-5 instruments, mood, dynamic arc, instrumental only.
- Write mood progression, not static emotion.
- Write an avoid list to avoid generating elements unsuitable for promo videos.
- By default generate 2-3 candidates, not just 1.
- When iterating, change only one variable at a time, e.g. only BPM, only drum density, only mood words; do not rewrite the whole passage, otherwise it is impossible to tell whether the change was effective.
Important Correction: Apple-style visuals do not equal Ambient BGM
Black background, minimalist typography, and real software interfaces can be Apple-style; the music should not automatically become ambient pads + soft pulse + glass ticks。
Product promo videos/product showcase videos usually need:
- A clear rhythm bed.
- A memorable instrumental hook, e.g. synth pluck motif / piano motif / bass riff.
- Bass movement, not just a low-frequency bed.
- Section contrast: intro, product reveal, workflow lift, CTA resolve.
- Commercial-ad-level polish, not stock-library-style "tech atmosphere."
Unless the user explicitly requests extremely quiet, meditative, background ambience, do not disable drums by default. What should be disabled is the wrong drum kit:trap hats、EDM festival drop、trailer booms, overly oppressive kick drums.
Alternatives must be truly different
It is forbidden to use the same set of words to generate multiple "seemingly different" candidates, for example:
minimal / premium / tech / ambient / warm pads / soft pulse / glass ticks
Each alternative direction must change at least 4 of the following 6 dimensions:
| Dimension | Variable Items |
|---|---|
| Genre | commercial product launch, clean UI groove, founder film, tech-pop instrumental, executive cinematic |
| Rhythm | four-on-the-floor, syncopated UI groove, restrained hybrid beat, half-time, no-percussion |
| Bass | sidechained synth bass, warm sub pulse, plucked bass, cinematic low strings |
| Hook | synth pluck motif, piano motif, glass/marimba motif, string ostinato, bass riff |
| Energy curve | early groove, slow build, mid-film lift, final drop-out, constant drive |
| Palette | drums+bass+synth hook, piano+strings, modular synth+percussion, guitar+electronic drums |
If two prompts share more than two core elements (genre, rhythm, bass, hook, palette), they do not count as qualified alternatives.
Mureka Prompt Quality Check
Must check before generation:
| Check item | Product promo BGM requirements |
|---|---|
| Description method | Write modern commercial product launch music..., do not write create/generate a track... |
| Style specificity | Do not write only tech music, write commercial product launch / clean UI demo groove / premium tech-pop instrumental |
| Emotional consistency | Do not write both calm and explosive EDM drop such conflicting directions |
| BPM | Must give BPM or explicit tempo; product showcase videos commonly use 100-124 BPM, only extremely restrained versions use 84-96 BPM |
| Instruments | Specify 3-5 sound sources, avoid piling too many and causing the sound to lose focus |
| Hook | Must have one instrumental hook or riff, avoid pure pad bedding |
| Dynamic arc | Must write branded intro -> product groove -> workflow lift -> confident resolve or write by time segment |
| Vocals | BGM defaults to instrumental only / no vocals / no lyrics |
| Avoid items | Explicitly exclude sleepy ambient, generic corporate piano, trap hats, EDM festival drop, corporate jingle, etc. |
Dynamic arc writing method
Prefer using two layers of dynamic arc:
- Full-film emotional arc: summarize in one sentence how the music changes from opening to ending.
- Time-segment arc: write by shot segment
0-6s / 6-14s / 14-24s..., each segment corresponds to the visual event and music density.
Preferred example for product showcase videos:
branded intro -> product groove -> expert-card rhythm -> workflow lift -> confident CTA resolve
For a 60-second software promo video, do not write it as the same loop throughout. At minimum there must be:
0-6s: brand intro, can leave space, but must plant a hook or filtered rhythm.6-15s: pain point/character pressure, rhythm begins to establish.15-34s: real UI and expert cards, this is the main body of the product groove.34-54s: parallel process and timeline, energy should rise, do not continue laying it out flat.54-60s: CTA closing, can briefly drop-out then resolve.
Failure modes and corrections
| Symptom | Possible cause | Correction method |
|---|---|---|
| Generated result feels very “stock library” | prompt is too generic, like corporate tech music or premium ambient |
Use the commercial product video lane:commercial product launch / tech-pop instrumental / clean UI groove |
| Multiple candidates sound the same | Candidates share the same set of genre, instruments, and rhythm | Rewrite by 备选方案必须真正不同 , change at least 4 dimensions |
| Music is very boring | pad/pulse throughout, no hook and beat | Add plucked synth motif、sidechained synth bass、tight electronic drums |
| Hit points are not obvious | Only wrote mood, did not write hit points | Add clean glass hit at 14s、muted ticks at 24s , etc. |
| Music is too full, blocks subtitles | lead melody is too strong or drums are too forward | Add short hook, not a busy lead melody、controlled drums、wide midrange space |
| Drums are too heavy | Did not exclude dance / trailer / trap elements | Add no trap hi-hats, no EDM festival drop, no trailer booms, do not directly write no drums |
| Emotion does not fit the product | Adjectives conflict or there is no dynamic arc | Unify mood, and write sparse -> controlled -> resolved |
Video soundtrack Prompt structure
Each BGM prompt uses this structure:
[specific genre], [tempo/BPM], [instrumental only], [rhythm + bass + hook],
[3-5 instruments / sound sources],
[dynamic arc by timestamp or section],
[hit points / transition accents],
[mixing notes for product video],
[avoid list]
Required elements
| Element | Requirement |
|---|---|
| Genre | Specific to the subtype, for example commercial product launch, clean UI demo groove, premium tech-pop instrumental, executive cinematic with beat |
| BPM | must give a value or range; must serve the sync points |
| Rhythm | specify the rhythm type, for example tight electronic drums, syncopated UI groove, restrained hybrid beat |
| Bass | specify the bass movement, for example sidechained synth bass, warm sub pulse, plucked bass |
| Hook | specify the silent hook, for example bright plucked synth motif, soft piano motif, bass riff |
| Instruments | 3-5 clear sound sources |
| Dynamic arc | write by time segment: 0-6s / 6-14s / 14-24s ... |
| Hit points | indicate the musical action at the transition points |
| Mix | state clearly that it is suitable for voiceover/subtitle space, even if the current video has no spoken narration |
| Negative | no vocals, no attention-stealing melody, no heavy drums, no clichéd corporate music, etc. |
BPM and sync point strategy
Choose BPM
Prioritize making the shot cut points close to the beat:
| Video type | Recommended BPM | Applicable |
|---|---|---|
| Commercial product promotion / showcase film | 112-124 | More like a product ad, with groove, hook, and a sense of propulsion |
| Real software UI demo | 104-116 | UI sync points, cards, flow lines, information density |
| Apple keynote style / high-end tech product | 92-108 | Restrained but still with a clear rhythm |
| Swiss data style / information-dense | 104-118 | Clean, pulsing, chart sync points |
| Cyber tech style | 118-132 | Stronger dynamism, scan lines, CLI |
| Minimal business style | 76-92 | Steady, low interference |
If the user explicitly says "product promotion showcase BGM", do not default to 92-96 BPM ambient; prioritize starting from 112-120 BPM product launch / UI groove. Only when the user emphasizes extreme restraint and almost no drums should you drop to 84-96 BPM.
Transition music actions
| Transition type | Music action |
|---|---|
| Scale Blur / black screen suck-in | soft sub drop + reverse swell |
| Flash Cut / official website short transition | short glass hit / clean chime |
| UI entrance | low pulse opens + airy shimmer |
| Card matrix appearance | muted tick sequence / arpeggio notes |
| Flow line expansion | pulsing synth ostinato |
| CTA | bass resolve + long warm pad tail |
Style mapping
| Visual style | Music style |
|---|---|
| Apple keynote style + real software interface | commercial product launch, clean UI groove, premium tech-pop instrumental, executive product score |
| Swiss International style | clean modular synth, restrained pulse, dry percussion, precise grid rhythm |
| Cyber tech style | dark electro, granular textures, tight pulse, digital glitches used sparingly |
| Minimal business style | modern corporate ambient, piano pulses, light strings, low percussion |
Verified effective default dual track
For "software product promotion showcase films" like WorkBuddy OPC, by default prioritize producing two directions:
| Default direction | When to use | Prompt skeleton |
|---|---|---|
| Commercial Product Launch | More like a modern product launch ad film, needing a product launch feel, a sense of propulsion, and CTA momentum | 118 BPM, tight electronic drums, sidechained synth bass, bright plucked synth hook, warm chord pads, clean UI impact hits |
| Clean UI Demo Groove | More like a high-end software UI demo film, needing service interfaces, cards, flow lines, and timeline sync points | 112 BPM, muted kick, crisp snare snaps, syncopated digital percussion, rubbery synth bass, short glass-pluck motif |
These two directions have been verified in the WorkBuddy OPC run:
promo-v2-commercial-launch-01.mp4: suitable as the priority candidate for the product launch ad film direction.promo-v2-ui-groove-02.mp4: suitable as the priority candidate for the real software UI demo direction.
In the future, do not first write this type of requirement as minimal / ambient / soft pulse / glass ticks. Unless the user explicitly requests a "quiet atmosphere", the first round of BGM should first generate the dual track above.
Current WorkBuddy OPC example template
When the video is "WorkBuddy Expert Team - OPC·one-person company scenario", do not start from an ambient pad. Prioritize starting from the product showcase film prompt:
modern commercial product launch music for a 60-second AI software showcase, 118 BPM, 4/4, instrumental only, polished, confident, forward-moving. Tight electronic drums, sidechained synth bass, bright plucked synth hook, warm chord pads, clean UI impact hits. Structure: 0-6s filtered branded intro for OPC; 6-15s groove builds under solo-founder pressure; 15-24s full product-demo beat as real WorkBuddy UI appears; 24-34s hook variation and crisp accents as expert-team cards assemble; 34-44s stronger rhythmic lift for team-lead decomposition and parallel expert work; 44-54s open uplifting section for OPC workflow timeline; 54-60s short confident resolve for “one more team.” Hit accents at 6,14,15,24,34,44,54,57.1,58.4s. No vocals, no lyrics, no sleepy ambient, no generic corporate piano, no trap hats, no EDM festival drop, no trailer booms.
Generation process
- Read the EDL and list all shot start/end and transition points.
- Establish
energy curve: 1-5 intensity for each shot, do not use the same intensity throughout. - Choose a BPM so that the main shot cut points are as close as possible to bar or half-bar boundaries.
- Write
Primary Prompt, must include dynamic time segments and hit points. - Compare against
Mureka Prompt 质量检查, remove vague words, conflicting words, and imperative sentences. - Write at least three genuinely different alternative prompts:
- A: commercial product launch, ad-style product showcase, with beat and hook.
- B: clean UI groove, software interface sync points and process progression.
- C: founder film with momentum, one-person company emotional narrative but must not turn into slow ambient.
- If the user explicitly wants something steadier, you may add D: executive cinematic with beat.
- Write
Negative Prompt。 - Give generation suggestions:
n=3, prefer instrumental, generate 60-75 seconds, then finally cut to 60 seconds according to the EDL. - [PAUSE] wait for the user to confirm the music direction and prompt。
If you want to actually generate music
Only execute when the user explicitly wants to generate audio.
- Check
MUREKA_API_KEY。 - If it does not exist, prompt the user to configure it and stop.
- If it exists, use the Skywork Music Maker / Mureka instrumental method provided with this repo
scripts/mureka.py:
python scripts/mureka.py instrumental \
--prompt "<validated English prompt>" \
-n 3 \
--format mp3 \
--output assets/bgm/
For the domestic site key, you need to set both:
export MUREKA_API_URL="https://api.mureka.cn"
The script comes from Skywork Music Maker and retains its command structure; this repo only allows changing the API base to read MUREKA_API_URL, do not write the API key into project files.