[sdiy] MOTM 440 4P LPF questions

[Tom Wiltshire]

On 30 Oct 2011, at 21:30, David G Dixon wrote:

> 3) Why should a "discrete OTA" give any better results than an IC-based OTA
> or VCA? 

I don't know the answers to the previous two questions, but I can have a pop at this one;
because in many cases the IC-based OTAs and VCAs aren't available any more, but the discrete components that make them up still are!

That would be my only motivation for building a 'discrete' version. If I want a SSM2040 filter, it's the only way I'll get it. Otherwise I agree - I don't see any reason why discrete circuitry should sound better. In many cases the improved matching that you get by having everything on one die should mean the reverse is true.

T.