I’m sure most of us knew that the voice of the Daleks was ring modulated. Was watching a bit of a docu on Dr. WHO and they showed them using two Moogerfooger Ring Modulators for the various Dalek voices.
yeah ive seen that! the new series uses the MF102 for the dalek and i think cybermen voices too 
Or the BBC sells an awesome software program called “Dalek Voice Pro” for 5 quid
I like the idea of professional daleks.
What video is this that shows the foogers?
Was one of the documentaries they showed about the production of the new episodes and the they were at a table duing a read through. The fellow who does the Dalek voices uses the ring mods even during read through and had them on the tables set to different settings for quick switch between voices. Look on BBC site to see if you can dl it.
A bit late to this post, just having watched the documentary, here’s money shot of the Dalek Moogerfoogers 