I'll try to provide as much information as I can. I am running Garritan Personal Orchestra 5 on Windows 10 64bit OS. I have been digging through forums for months and I can't seem to figure out why I am only able to play the first instrument in an ensemble. I am using an M-Audio Keystation 49e as my controller. I am not incredibly versed in MIDI setup so I imagine the problem is occurring there somewhere. The example I've been using is the String Quartet ensemble (Violin1, Violin 2, Viola, Cello). I have tried changing the Outputs on each instrument (1/2, 3/4, etc) and toggled the Channels to match those indications in the Aria Player settings with no luck. I even tried to load instances of MIDI Out on the FL Studio Channel Rack and attach the channels there to the channels in Aria Player. I feel like I'm missing something vital because no matter what I do, it only plays the Violin 1 in Channel 1. I would love some help because I'm this close to smashing my head into the wall haha. I'm happy to post any screenshots of anything that might help anyone to identify the problem.