SyncAudioInput:
    | string
    | Uint8Array
    | ArrayBuffer
    | Blob
    | ReadableStream<Uint8Array>
    | NodeJS.ReadableStream

Audio input for synchronous transcription: a local file path or data URL (file system access requires Node.js, Bun, or Deno), raw audio bytes, a Blob/File, or a readable stream.

URLs are not accepted — the sync API has no URL ingestion; use client.transcripts for URL or asynchronous transcription.