[Mac] Playback audio distorting if chorus and reverb not 0
trunk rev 5562
- mac lion 10.7.3, xcode 4.3, compile rev 5562 and debug, mainly using soundfont : GeneralUser GS 1.43 MuseScore.sf2, acoustic_piano_imis_1.sf2
- open a music score, play it, the audio is distorting
- If in both Mixer & Synthesizer dialogs, set chorus & reverb effects to 0, then the audio back to normal.