High CPU Load with ZynAddSubFX and Ardour

[lilith]

Hi,

i'm running Ardour 5.8.0 on KXStudio (14.04). I have two ZynAddSubFX plugins:
1. from falkFX
2. from ZynAddSubFX.

With the first one I don't get any sound and with the second one the CPU is rising to infinity even when I don't play anything.

Any ideas what might be wrong here?

I posted the question also in the Ardour community ...

[lilith]

Solved: It works with the falk version without CPU load. Midi was not enabled.