Graham, you mentioned that all of your music work is on an external drive. If EastWest is on that drive then that MAY be the problem as USB is slower that SATA. Internal drives work much better for large VSTis for things like sample streaming and rendering.

You also gave your computer stats but I sow nothing about your audio interface. If it is the MO audio like Realtek then that also may be the problem. If it is not a MO audio then try either increasing your MIDI buffers and/or trying ASIO. ASIO is not just for recording.


Whenever I get something stuck in the back of my throat, I dislodge it by drinking a beer.
It's called the Heineken Maneuver.

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware