I'm on Windows XP using ASIO.

The project I'm working on has 4 tracks but I'm only playing back 2 at a time.

(I've been given a guide track and I'm recording bass tracks against it - one fretted and one fretless which is why I'm only playing back one of those plus the guide at any one time. The 4th track is a click track I've created but I'm not playing this back.)

An example of the second problem is that if I'm playing a track and open the DirectX/VST window, if I re-position it on the screen by dragging with the mouse, sometimes it will create a loud beep and sometimes it will cause the playback to falter. The same sometimes happens if I'm editing an effect during playback.

As you've probably already gathered, I'm not all that technically knowledgeable, but I'm not using anything that doesn't come with PTPA.

Hope this helps.