buzzer-audio-preview
Skill0 starsChanged 17 days agoMITView on GitHub
Preview buzzer tones as MIDI and WAV.
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The file
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Buzzer Audio Preview
Prerequisites and boundary
Use installed Bun on Linux or macOS; no Python or third-party MIDI/audio library is required. The helper reads one regular UTF-8 JSON score no larger than 1,048,576 bytes and accepts at most 65,536 events, including zero-duration events. These limits are checked before JSON parsing or event mapping/encoding. It writes .mid/.wav files in the selected output directory, performs no playback, network access or device writes, and replaces existing matching output files; choose a fresh output directory when keeping prior previews.
Overview
把“蜂鸣器音效/旋律”从一个可编辑的 score.json 生成两份输出:
*.mid:便于 DAW / MIDI 工具里查看与继续编辑*.wav:便于直接试听预览(默认方波,贴近常见 PWM 驱动的无源蜂鸣器)
Quick start
- 进入本 Skill 根目录后复制示例输入:
cp assets/score.example.json /path/to/score.json- 生成
MIDI + WAV:
bun scripts/buzzer_preview.ts \
--in /path/to/score.json \
--out-dir /path/to/fresh-audio输出示例:
/path/to/fresh-audio/score.mid/path/to/fresh-audio/score.wav
score.json format
只保留最常用字段;其它字段可留空用默认值。
- 顶层参数(可选)
tempo_bpm:默认120ppqn:MIDI 分辨率(ticks/quarter),默认480sample_rate_hz:WAV 采样率,默认44100waveform:"square"(默认) /"sine"volume:0.0..1.0,默认0.7fade_ms:每个音的淡入淡出(减少 click),默认2
events:事件数组(按顺序播放)- 音符:
{ "note": "C5", "beats": 0.5 }或{ "note": 72, "ms": 200 } - 休止:
{ "rest_beats": 0.25 }或{ "rest_ms": 100 } - 频率(WAV 预览用):
{ "freq_hz": 1000, "ms": 150 }- 生成 MIDI 时会近似到最接近的音高(不做 pitch bend)
- 音符:
Notes / guardrails
- WAV 是“电子合成预览”,不模拟蜂鸣器腔体/谐振/音量曲线;用来确认旋律、节奏、时长是否符合预期。
- 若你要“跟固件的毫秒级时序一致”,优先用
ms/rest_ms描述事件(而不是beats)。
The supported score schema, numeric limits, rounding and behavior-test command are in the media contract. Run the helper from a checkout or a directory symlink; no repository installation step is required for generation.
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