While setting up Metro a window popped up that allowed me to to select the MIDI channels that I could record to and that I could play from. It gave me the option of selecting any or all of 16 MIDI channels for recording and playback, each channel had a check box. It also had a check box for recording to one channel only. For the life of me I cannot find that window again. If my description of the window sounds familiar and you know how to get there please let me know.
Thanks, Timm