Hi. I am guitar player and use QBase 3.7 on my computer to record. i have a digitech studio S100 effects prosessor and turtle beach sound card. all this goes in and out of an eight channel board, into a yamaha 2500 pa amp. what i want to do is add either a keyboard or computer program to create midi accompniment for back up tracks. this is all new to me. does anyone have any ideas?