Hurray a question!

[René Schmitz]

At 14:54 10.04.00 -0700, you wrote:

>It's true the EFM ms20 filter isn't perfect. (gasp shock horror!) it's
>also true the original ms20 vcf wasn't perfect ether. The EFM 
>version sounds exactly like the original except there is a little more 
>gain in the res-loop so you can overdrive the res a little more. I put 
>up a wave file to show this a while back. 

I have increased the loopgain either on my clone, to give it even more 
"wavy warp". But what I think, is that the properties of the diode limiter
influence the sound as well. Its response is high gain for an input less
than three diode drops, and low gain above/below that, while the soft
clipping of that OTA will behave a little different. 

I attached a gif to visualize what I mean.

We see that outside the window formed by the clipper, we have approximately
unity gain, too low for selfoscillation.
The original thing can only resonate between -2.1 and +2.1V. Since the
loopgain is high enough here. So the large signal response should be
different to the VCF8e. When I observed a sawtooth filtered by my unit,
I've seen a saw with a "packet" of oscillations arround the center of the
wave, unlike in other filters where the ringing usually starts on the edge
of the waveform.

>I wouldn't want to only have ms20 type filters any more than I want
>only SSM2040s. Varity is the spice of life and different tones make 
>music interesting.

So true! But if someone asks about a smooth filter I would say "moog" or
"2040".
Which both have character and aren't clean either (when overdriven!).
If someone wants distinguishable sound then "MS-20" or "WASP". 

>This debate does take something away from the fact that is a terrific
>sounding filter. 

Sure, I like it.

>Even if the Joni Mitchell crowd thinks it's nasty there
>are those of us who want that edge in our music. I like a lot of music
>but I prefer overdriven distorted Marshalls and Les Pauls would it
>be fair of me to say everything else sucks.....No! 
...
>Sometimes you guys are such snobs!!!

There is no such things as perfect things. Only varying tradeoffs!

But, hell you're right, I am a snob! 

Bye,
 René



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