# μ-law PCM codec registration ## Description The μ-law companded PCM audio codec, specified in [ITU-T G.711](https://www.itu.int/rec/T-REC-G.711) Tables 2a and 2b. ## Codec ID ```ts 'ulaw' ``` ## `EncodedPacket` data The packet's data must be a sequence of bytes of arbitrary length (divisible by the channel count), where each byte is a μ-law encoded PCM sample. For multichannel audio, samples from different channels are interleaved. ## `EncodedPacket` type The packet's type is always `'key'`. ## `AudioDecoderConfig` codec string ```ts 'ulaw' ``` ## `AudioDecoderConfig` description `description` is not used for this codec.