minimal interpolating scanner

[jh]

>Since there are only 2 inputs being interpolated (panned) at a time, you can
>save parts by making ONE voltage controlled panner, and switching the inputs
>to it as required.
>
>The inputs can be switched by a pair of 8 to 1 analog multiplexers.
>
>Consider the CV input. Let this go to an A to D convertor.
>The highest 3 digits can be used for addressing the multiplexers.
>Then, with a 3 bit D to A convertor (a few Rs and op amp) you can get a 
>voltage which, subtracted from the CV input, gives a suitable control for 
>the panner.
>
>I dont think it can get much simpler than this..
>
>paul perry (Frostwave P/L) Melbourne Australia

This idea was coming up some time ago. Problem is that you need
much better alignment of the triangles. With several VCAs, misaligning
means a little overlapping. Witch MUX and 2 VCAs, misalignment
means that you hear a glitch. 

JH.