Currently, Rosetta needs to be installed before installing the Splashtop Business app, Splashtop Streamer, and Splashtop SOS App. We are working with M1 hardware to include native support.
As of the 126.96.36.199 Streamer update, audio is now working correctly. Please update the Streamer to version 188.8.131.52 or later version to stream audio.
If you are unable to get it to work, please open a support ticket.