I just want to know how to add free virtual instruments in Reaper. Also, I have a bug that persisted over Linux installations where when taking MIDI input from my musical keyboard, Reaper would detect the first note I played, but it wouldn't detect that I stopped playing it, and it wouldn't detect any new notes until like 10 seconds later. I have a MIDI cable plugged directly into a USB port of my computer, so if you could help that would be appreciated.