i have a AKG c3000b condensor mic, a roland jx 305 groovesynth keyboard and a drum machine all connected to a Behringer eurodesk all running into Cubase sx, everything works fine and have been able to make some good recordings over the years, i wanted to record a jam the other day with guitar, bass etc but realsied when phantom power is switched on to enable to mic to work as well the keyboard distorts, the desk doesnt have a individual +48 for each channel and just an overall phantom power switch, how can i have both inputs at the same time without distortion from the keyboard?