I'm having big problems with a lot of the V Collection 4 in Pro Tools 11 on Mac (Mountain Lion) but with Spark worse than all of them.
All plugins are latest versions. I'm getting massive CPU spikes and glitches. Even with just one instance of Spark open, with no internal effects processing going on and just sat idle I'm getting 100% CPU spikes. If I try to play samples they glitch and spike. CS80V, Mini V, Wurlitzer V all spike with just one instance open and playing a few notes. None of this happens in Cubase 6 or Ableton 9 or Reaper 5.
I've submitted a support ticket (4 days ago) but I've yet to hear anything.
Bulley