[sdiy] Famous Fixed Filters - FFF PCB ?

[JH.]

>I you are including filters of old electronic organs, would you
>implement the original circuit, including inductors?

If I'd build it for my own, single quantity, I'd probably roll my own 
inductors.
But as this isn't the easiest task, I'll probably go for GIC filters.

>By the way, I had some good success emulating fixed filters
>(including those of the Philicorda) with the "Match EQ" plugin of
>Apple Logic. You just need a few sound samples of the filtered signal
>and an idea what the input signal could have been (for the Philicorda
>I assumed a simple sawtooth). From this the "Match EQ" calculates a
>filter response.

So they analyse several sounds, and what they have in common must be the 
formants?
Sounds interesting!

JH.