I plug my board plugged into the AudioBox with a quarter inch. I put a beat or the metronome on and then I start recording. While I'm recording everything is on time and sounding great. When I play it back for what ever reason my keyboard speeds up and is way off time. Example I'll record it at all 120 BPM. Play the keyboard on time with the beat and then the keyboard would do a playback going (a guesstimate) 125 BPM while the metronome or the drum track is still going 120 BPM. I don't do anything except stop the recording and then play it back to me.