MOTM

It can be done as others have mentioned, but compared to the ladder 
filter, the circuit is VERY complex, expensive, uses hard to find 
parts, and is hard to set up. Most manufacturers today cop out on 
doing it in analog electronics because it's way easier to do 
digitally.

Moe

>>>>
Everyone copies Moog filters, why can't they copy the Moog/Bode 
frequency shifter?
<<<<