Hi,

If I take the output (without any input)from my A-107 and feed it into my A-138B mixer, a constant noise can be heard, like the sound of a noise generator,this is louder on some filter presets than others.
If this signal is fed through a VCA, then the sound is, as to be expected, much louder....the sound is also there when the filter is receiving a sound source.....any suggestions, please.


Kind regards