Synchron Piano produces al lot of glitch sounds, especially when you use CC64 for sustain pedal! I thought it was my i5 quad core processor so I bought an iMac pro Xeon 8 core. Unfortunately the results is the same. I can beleve it!
I am afraid that Vienna Synchron Piano does not support multi-core processors! I compared the CPU meters of both computers (iMac i5 quad core and iMac pro Xeon 8 core): the peak values are absolutely the same!!! That is incredible!
I made the same test with Vienna Synchron Piano stand-alone, just to exclude (for a second time) that the issue coming from Logic or Ableton Live, but the result is even worst.
Have you experienced similar problems???