[sdiy] hum on the outputs

[Ingo Debus]

Am 05.06.2009 um 23:27 schrieb Danjel van Tijn:

> I have an Ensoniq DP4+ and on one pair of the outputs (3+4) I have
> this hum/buzz that seems to float in from time to time (but not the
> headphone jacks or outputs +2). This will happen even without audio
> sources plugged to the inputs and the fx on blank presets. What kind
> of internal failure or problem would cause these symptoms? The buzz is
> not all the time and when it does appear it seems to waver in volume.

I'd look for bad ground connections between the PCB and the case. I  
don't know about the DP/4+, but the DP/4 has lots of them.

Ingo