Hello Paul,
I don't think I've heard of that specific problem before, and I don't have any experience with iiyama touch-screens, but some general troubleshooting steps from the "
Performance tuning | Other operating system and computer optimizations and diagnostics" section of the Hauptwerk user guide (which starts on page 320 in the v8 version) which could be worth checking are:
- Make sure that all available motherboard BIOS updates are applied.
- Make sure that all available Windows updates are applied.
- Make sure all available firmware and driver updates for hardware devices are applied, and especially so for audio/MIDI interfaces, the graphics card, the motherboard, and the touch-screen(s). Check on their manufacturers' websites if needed.
- Make sure that all Windows power saving options are disabled, and especially the option relating to putting USB devices to sleep.
- Try running LatencyMon (
https://resplendence.com/latencymon ) when Hauptwerk is running, and see if it reports any problems when the glitches occur. (If so, it might indicate which driver/device is causing them.)
You could perhaps also try connecting the touch-screen via a different USB port, e.g. one that's directly on the motherboard (rather than via a USB hub), or at least to one that doesn't share a motherboard USB port/hub/bus with the audio interface.
Best regards, Martin.
Hauptwerk software designer/developer, Milan Digital Audio.