#1 Volume goes to maximum when Roon has been set to “DSP volume” and back to the default “Device volume”.
Note: This problem can not be solved in our software at the moment.
Bug appears when: Normal playing state → Enter Settings menu in Roon → Go to Audio → Go to Device setup for the MU1 output → Change Volume control setting to DSP Volume → Save and exit menu → Enter the Device setup menu → Change Volume control setting to Device volume → Save and exit menu.
What is wrong: Device menu is not operating as intended, LS1 menu goes to maximum (23dB). When volume is lowered it is set back to maximum when the next track starts. Warning: This can damage your ears and loudspeakers (depending on track loudness).
To get out of this state: Enter Settings menu in Roon → Go to Audio → Go to Device setup for the MU1 output → Press Load Defaults in the bottom left corner → Save and exit menu.
#2 Roon cannot update to v1.7 on the MU1.
Bug appears after updating the Roon remote app of the tablet or smart phone.
Solution: run the MU1 updater to install firmware version v1.0.4.