Audio transcoder

Browser-local audio inspection and transcoding in module Web Workers. Local Blob and File inputs stay on the device; HTTP inputs are fetched from the source explicitly supplied by the host application.

pnpm add @echovisionlab/audio-transcoder

import {
  createAudioTranscoderStreamWorkerPool,
  createSelfHostedRuntimeAssetSource,
} from "@echovisionlab/audio-transcoder";

const pool = createAudioTranscoderStreamWorkerPool({
  codecAssets: {
    source: createSelfHostedRuntimeAssetSource("/audio-codecs/0.1.0"),
  },
  concurrency: 1,
  maxQueued: 8,
});

WAV and AIFF use JavaScript only. AAC, Ogg Opus, MP3, FLAC, and resampling load the exact versioned WASM asset on demand. The application may self-host those assets or explicitly opt into the jsDelivr helper. See docs for the full API, integration, memory, security, and codec documentation.

Development

corepack enable
pnpm install --frozen-lockfile
pnpm typecheck
pnpm test:coverage
pnpm build
pnpm package:verify
pnpm package:pack

Codec source, pinned provenance, build scripts, license texts, and release asset verification are included in this repository.

Release

Release Please creates the GitHub release and versioned codec assets. The npm package is published through GitHub Actions trusted publishing without a repository npm token.

License

PolyForm Noncommercial 1.0.0. Commercial use requires a separate license from Echo Vision Lab. Bundled codec components retain their licenses; see THIRD_PARTY_NOTICES.md.