Hi Tero

> I have to double check the notes that are played by the VCO's when I'm
> back at home. Meanwhile I can answer to the other questions...
>
> The result is the same with internal clock or external clock and there
> is no cable connected to the trig in.
>
> I don't know if it makes any difference to this problem but my mono/poly
> has been modified by the previous owner. It has individual CV inputs for
> the VCO's (no individual trig inputs, only CV). However, I don't have
> anything connected to the CV inputs.

It is difficult to judge this without knowing details about the modifcation.

In fact the behaviour you are describing is like there would be a
trigger coming in to the Trigger input. This would override the muting
switches which select the individual VCOs (I use this sometimes
willingly to create chordtriggers which are not set with chordmemory,
but by hand and shall be held).

Florian