Univibing a Polyphase?

[bucky]

I'm building a Polyphase, and I was wondering if there is any way to be able to add some sort of switching to switch between the regular phase mode, and a vibe mode.  I also need to know which caps need to be switched and for what values.

Thanks a lot.

[Seljer]

The capacitors that you'd be chaning are the ones between each phase stage (from the output of one opamp to the non-inverting input on the next one). The unvibe capacitor values are 15nF, 220nF, 470pF, and 4.7nF , though the univibe only has 4 stages, unlike the Polyphase which has 8 so I've got no idea what you'd do

the other thing a univibe has is the vibrato mode, for which you'd just disconnect the resistor that is carrying the clean signal (not sure if that'd cause a drop in volume though)

[bucky]

Yeah, I guess switching 8 caps simultaneously could pose a bit of a problem.