I downloaded the multitracking program Reaper yesterday and recorded a few tracks. At first it was fine but now i think i have changed some setting because when i listen to whatever i recorded in it comes out about 2 semitones sharp.

eg, i recorded a simple chord progression :G,C,Em,D then i tried to improvise over it (while recording it in) using the G major scale. Because of this 2 semitones thing it sounded terrible but when i listened to it back it sounded great because my improvisation came out sharp aswell.

So have i changed the setting or is it something worse. And how can i change it back?