CV Crossfader?

[Haible_Juergen#Tel2743]

> Does anyone have a good schematic for a CV crossfader?  Seems like it
> would be similar to a CV'd mixer, but wouldn't you need non-linear 
control?

Both lnear and expo crossfade are useful.
The LFO/noise section of the Prophet 5 rev. 3 service manual shows
a nice linear crossfade circuit. For expo crossfade, use a PNP
long tailed pair to control the balance of the control currents of
two OTA's.

JH.