Does Sinch support muting on an App-to-App Call?

Yes, you can mute the input using com.sinch.android.rtc.AudioController on Android, and SINAudioController on iOS. Sinch does not support muting the output; it can only be done by the user by silencing their volume.

Visit the In-App Voice Calling product page to learn more about Sinch’s In-App Voice calling products.