I have just bought MacBook Air Retina and I am experiencing quite a big distortions (digital drop-outs) while playing back the score and/or MIDI keyboard.

I thought that the reason could be Note Performer 3, but I switched back to Garritan and the problem persists.

I tried to increase buffer size from 512 up to all possibilities (MIDI/Audio-Device Setup-Audio Setup), it does not help, even the latency while playing MIDI keyboard increases, too.

Does anybody else have this problem?

Thank you for your comments.