I am sending a midi track (through the MIDI output on my Firestudio Project) to an external keyboard, and recording the output of that keyboard onto an audio track. I get random, unpredictable errors when I do this -- missing notes, missing sustain pedal events, even sometimes added notes. I can play back and monitor the midi track, and it will not make mistakes, or at least not in the same places as it did when recorded onto the audio track.
I have tried many different combinations of settings (midi clock, timecode, etc.) with no effect.
I am using Studio One 2 Artist with a Firestudio Project and Windows XP. I know XP is not supported anymore but it was when Studio One 2 came out, and I have done this exact same procedure (convert midi to audio using my external keyboard) with other software without any errors. I have the last version of Studio One 2 (188.8.131.52360). My drivers (Universal Control) are up-to-date.