AudioToTranscribe: {
    toLocaleString: (() => string) | (() => string);
    toString: (() => string) | (() => string) | (() => string);
    valueOf: (() => string) | (() => Object) | (() => Uint8Array);
}

The audio to transcribe. This can be a public URL, a local file path, a readable file stream, or a file buffer.