Google currently lets users adjust volume levels of media, calls & notifications, and alarm on Android. With Android 11, Google is apparently working to expand that to virtual assistants.

Android 11 adds a new stream type: AUDIO_STREAM_ASSISTANT. “This is intended to be used by a virtual assistant like Google Assistant, Bixby, etc. The audio stream has own volume alias and the volume does not change by volume changes of other streams.“https://t.co/3omy2phZQM

“New stream type: AUDIO_STREAM_ASSISTANT. This is intended to be used by a virtual assistant like Google Assistant, Bixby, etc. The audio stream has own volume alias and the volume does not change by volume changes of other streams,” states Google.