Hi all,

I have built a volume control circuit using opamps and a digital pot.
The opamps I am using are NE5532N. The input buffer and output driver amps
are configured as inverting amplifiers. This is so I can add gain later if
need. My problem is that as the circuit reaches unity i.e. digital pot is at
0. The input amp has a hi frequency osc. This is not audible nor does it
noticabley affect the audio but should not be there. I have read somewhere
that I should have some capacitance somewhere to stop this but can not find
the reference :-((

Also what value input decoupling capacitor do you recomend


Thanks a bundle

Matt

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