Encoding allows you to specify the expected encoding of your submitted audio.

encoding string.

Encoding is required when raw, headerless audio packets are sent to the streaming service. If containerized audio packets are sent to the streaming service, this feature should not be used.


If you are using the Encoding feature, the Sample Rate feature is also required.

Enable Feature

To enable Encoding, when you call Deepgram’s API, add an encoding parameter in the query string and set it to the audio coding algorithm of your submitted audio:


Deepgram supports the following audio coding algorithms:

  • linear16: 16-bit, little endian, signed PCM WAV data
  • flac: Free Lossless Audio Codec (FLAC) encoded data
  • mulaw: Mu-law encoded WAV data
  • amr-nb: Adaptive Multi-Rate (AMR) narrowband codec
  • amr-wb: Adaptive Multi-Rate (AMR) wideband codec
  • opus: Ogg Opus
  • speex: Speex
  • g729: G729 low-bandwidth (required for both raw and containerized audio)