What are the filter types exactly

Johnisfaster · March 6

I see TR and Sk1 OTA and such but I have no idea what thats supposed to mean.

NoiseFloored · March 6

This is my understanding:

SK: Sallen-Key, based on the Korg MS-20 original filters
OB: based on the Oberheim multi-mode filters (not sure if SEM, Matrix-12 or other)
OTA: based on the Roland Juno-60 (and others) filter
TR: transistor ladder, based on Moog filter

Not sure about the FDB filter, it was announced as “self modulating 2 pole LP filter” when it was added

Johnisfaster · March 7

Why have I never heard the ms20 filter called a Sallen-key?

number37 · March 7

I had never heard of it either. Lo and behold … 😎

Johnisfaster · March 7

Ive seen how inaccurate Ai can be so I’m gonna take that with a grain of salt.

number37 · March 7

There are dozens of links from reliable sources below that which back it up and provide more background.

Johnisfaster · March 7

Lol Im familiar with Google.

number37 · March 7

And yet dismiss the result of the AI summary rather than bothering to use Google. 😉

Johnisfaster · March 8

I'm a lazy skeptic 😁

lala · March 30

This is correct.

you probably never heard of salleen key, because everybody knows it as that “screaming” filter of the ms series.

newer stuff like the polybrute uses that too.

Johnisfaster · March 30

Ive only heard of the Steiner Parker filter. Never heard that the ms-20 had a Steiner Parker either.

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