Chosmochorus owners, is this normal??

[omarvolta]

A couple of months ago I bought a Cosmochorus and it sounds great, but the thing is that at slow speeds I can hear clock noise at the highest peak. Adjusting the trim pot helps but still there. Also with the intensity over 1 o'clock this whooshing appears and it gets really loud pretty quick. Some caps might need to be replaced perhaps?? Maybe replace the dual op amp for something less noisy too?? What would you recommend??

[anchovie]

What op-amp is in there at the moment?

[omarvolta]

If I remember correctly it's a 4558

[anchovie]

Do you know if that op-amp is responsible for the LFO, or is it in the audio signal path?

[omarvolta]

I think it's on the audio path, I'd have to check along with the other op-amp.

[omarvolta]

I thought I had seen a couple of op-amps but the other IC is a CA339E.