Speech SDK 1.20.0: January 2022 release

New features

Added getVoicesAsync() API to SpeechSynthesizer to retrieve the list of supported synthesis voices (GitHub issue 1350)
Added getWaveFormat() API to AudioStreamFormat to support non-PCM wave formats (GitHub issue 452)
Added volume getter/setter and mute()/unmute() APIs to SpeakerAudioDestination (GitHub issue 463)

Bug Fixes

Use script processor fallback for microphone input if no audio worklet is found (GitHub issue 455)
Add protocol to agent to mitigate bug found with Sentry integration (GitHub issue 465)