MOTM

> I know FFBs have been brought up before on the list but something that
might be
> interesting is to understand a few of the characteristics of the different
FFBs that
> have been made to see what makes them sound unique.  The Moog FFB has a
bunch of
> inductors and sounds very unique.  The EMS FFB is just a bunch of 741 op
amp filter
> circuits, I think and also has a unique and sought after sound.  I wonder
if JH has
> some wisdom and experience in this area to share...?

Not much wisdom (;->). I never built an inductor-based filter bank.
I have built a copy of the EMS filter bank once, and I like its smooth sound
a lot. The filters aren't very steep, which is part of its character.

There are 741's in the original, but there are also a lot of polystyrene
caps, and
the overall impression of its quality is very good, despite the poor opamps.
It's also built with very low impedance (large caps, very small resistors).

Personally I would not build a commercial clone of this -  EMS is an active
company - and I suppose Paul shares this point of view. But there's a lot of
other options for a filter bank ...

JH.