Thank you for adding this device. I just tested it. Most of the commands work well. "Toggle Mute" mutes the amp. By clicking the button the 2nd time nothing happens. I assigned "Mute on" an "Mute off" to the mute button. This muted the amp for a moment end then unmuted it. Is there another solution? Here https://techsupport.cambridgeaudio.com/hc/en-us/articles/360000271837-EDGE-A-RS232-Codes you can find on page 3 the different sources you can activate on this amp. To set up