The problem is not related to sequncer songs because the problem also occurs immediatly after swiching on the keyboard. I always have to press the pedal one time after switching on the keyboard or loading a song. If I do not, the volume will be as set by main volume, independant of position of pedal.
It even is not related to a possible wrong value of the potentiometer: I simulated the original resistance value of the Technics expression pedal (20kOhm) by connecting a 22kOhm resistor between tip and sleeve of the jack and by shortcutting tip and ring of the jack, thus simulating a non- pressed pedal. The volume should be zero after switching on but it isn't, the volume is as set by main volume.
I like to know if this also happens with the original expression pedal and if not what could be the cause?
BTW: I assume that if pedal is connected the function of main volume control is to limit the range of pedal. Is this correct?
Bert