Hall Hansruedi,

They happened with all styles, where especially strings were 'involved'. I had the impression the strings-sustain was way too long, so they kept the available voices for themselves. Because of this, sometimes the bass-voice muted and especially the Grand-piano showed pretty long latency.

Something 'consumed' voices and did not release them in time !? Another possibilty is a kind of internal MIDI-feedback loop ?

As I said, now the problem has vanished. I cannot reproduce the earlier problems and believe me I tried SOO hard

I did send mr. Sandro (Ketron) a copy of my experiences. (This might help while trouble shooting)

Roel