I guess there's no Tyros4 owners in this forum Christian_1. Or if there are any Tyros4 owners they apparently don't want to help you out I guess. >> Shades of Yamaha I reckon. That is, don't listen to customer's requests and/or shove it.

All the best,
Mike
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Yamaha Genos, Mackie HR824 MKII Studio Monitors, Mackie 1202 VLZ Pro Mixer (made in USA), Cakewalk Sonar Platinum, Shure SM58 vocal mic.