talertim
A seperate mute for each channel would be very nice.If I have the drums on and will mute to find the notes the drums will be also muted and that is not so good .
This is a user interface issue. Internally jammr supports multiple audio channels but exposing that to the user would complicate the interface.
I decided to simplify and only show one audio channel per user. It means your drums and guitar are combined and cannot be separated.
Most users just run one instrument so it keeps things simple for the majority of cases. I'm not sure if this will change in the future.
Stefan