I recently began working with audio files instead of just VST instruments and MIDI. After this (and after updating to Cubase 6.0.5 from the previous non-Beta update), I have run into a big problem where frequently the audio tracks do not play but the Instrument or MIDI Track(s) do.
This can happen in the middle of playback but most often occurs when I start playback. Starting and stopping playback once or twice fixes it, but it occurs often, about one-third of the time, so it is frustrating.
I have been looking for a post citing similar difficulties, but have not yet seen one. (Of course, posts move fast on this forum.)
I have Cubase 6.0.5 64-bit running under Windows 7 64-bit. My computer is an i7 and its memory is 16GB. My Audio Interface is an RME FireFace and the Buffer Size is set to 1024 samples.