a-audio
Leumas a-audio adapter pack — ffmpeg-backed audio tools (convert-format, trim, mix, to-8d-audio, vocal-removal, remix-worker, ...). ffmpeg deps are lazy-imported by individual adapters; this...
a-audio (adapter system)
Audio processing capability pack. Ported from leumas-middleware/lib/a.audio — 32 ffmpeg-backed operations. Stripped: express server.mjs, frontend/, bin/, docs/, processed_audio/ fixtures, queue.csv.
The real implementations (export default async function …) live under ./adapters/<name>/index.mjs and are imported lazily — the pack loads and lists its tools without fluent-ffmpeg or the ffmpeg binary present; the dependency is only touched when a tool is actually invoked. index.js marshals the args object into each implementation's positional parameters using that adapter's metadata.json input order (two object-arg tools — audio-breakdown, remix-worker — receive the whole args object).
Requiresfluent-ffmpeg(+ a systemffmpeg) at call time.audio-breakdown,generate-tone, andremix-workershell out viachild_process(and a Python worker for remix). These do filesystem I/O into aprocessed_audio/output dir.
Tools (adapters)
| tool | args | result |
|---|---|---|
change-volume | { audioFilePath, volumeChangeDb } | output path |
change-pitch | { audioFilePath, semitones } | output path |
change-speed | { audioFilePath, speedMultiplier } | output path |
fade-in / fade-out | { audioFilePath, durationSeconds } | output path |
trim | { audioFilePath, startTimeSeconds, endTimeSeconds } | output path |
extract-segment | { audioFilePath, startTimeSeconds, durationSeconds } | output path |
concatenate | { audioFilePaths, outputFileName } | output path |
mix-audio | { audioFilePaths, outputFilePath } | output path |
convert-format | { audioFilePath, outputFormat } | output path |
get-duration / get-metadata | { audioFilePath } | duration / metadata |
Others: add-echo-delay, add-reverb, add-silence, apply-equalizer, audio-breakdown, change-bit-rate, change-sample-rate, detect-silence, generate-tone, loop-audio, mono-to-stereo, noise-reduction, normalize-volume, remix-worker, remove-silence, reverse-audio, stereo-to-mono, to-8d-audio, transcribe-audio, vocal-removal. Input order for each is in its adapters/<name>/metadata.json.