@Lynx_TWO: The delay thing should be solved by the VST host. There is a VST call to query the amount of latency, and it's the host's job to compensate for that.
@about block sizes: For FM and streaming it doesn't really make sense, but for mastering it would. So I guess it would make sense for the VST plugins and for WatchCat.
Yes after some more tests I think it was the DAW that was randomly allowing the audio to shift, since it seems hit-or-miss, so it must be an issue with the software.
Looking forward to having larger block sizes for mastering use! I agree it wouldn't make any sense for FM and Streaming, too much latency; but hey I'm running this on dual Xeon system with 20 cores, 40 threads, and 192GB of DDR4 ECC RAM for restoration and mastering purposes, so bring on the memory usage!
Thanks and keep up the great work! I do love the fact I can also use this on at least 10 channels in REAPER and it seems to just work. Had no idea the VST3 plugin had multichannel support, but that's fantastic! It's amazing to me how many plugins, even brand new ones, don't add multichannel support.
EDIT: - OK, very strange - while in does appear that StereoTool VST3 in REAPER supports multichannel, only the first two channels are output at the same volume. The rest are muted quite a bit...