nevertheless, there haven't been any real changes to the code (that would explain both the sudden appearance of sound and the cpu-thing) i assume that you are doing your tests on the same machine with just Gem.dll exchanged (so directX and quicktime should _really_ be the same)
Yes, of course!!! Same machine, same everything. I just close PD, exchange the gem.dll, restart PD, open the patch again, and compare behaviours.
Something _must_ have changed that causes the appearance of audio. I assumed the CPU thing was the consequence of the audio thing but that was just my guess.
Now I'll try the new one.