Quote Originally Posted by Reid Malenfant View Post
Hi Chris, that'd be the two output muting relays opening
Thanks Mark but the pips are audiable when the signal is switched off not on, they do not make any sound when activated. I don't remember hearing them at all until I bodged it!

Interestingly, the whine reduces when the opamp board is swapped back in.

I thnk that two Caimans are a must when modding - you can always check the standard one out when stuck!

Regards