AS3350 Dual SVF

Dual state variable filter (SVF)

(2 customer reviews)

6.29 ex. VAT

386 in stock

SKU: AS3350 Category:
1 - 9€6.29 ex. VAT
10 - 99€5.66 ex. VAT
100+€5.03 ex. VAT


The Alfa AS3350 dual SVF (State Variable Filter) is a clone of the classic CEM3350 chip that was used in the Rhodes Chroma, one of the ultimate polysynths.

The chip allows you to build various multimode filter configurations, including LP/BP and BP/HP.

Alfa Rpar datasheet iconDownload AS3350 Dual SVF datasheet

There’s also some notes on using the chip from ElectroMusic Engineer Magazine from 1982.



Additional information

Weight 0.00115 kg
Dimensions 2 × 0.9 × 0.7 cm

2 reviews for AS3350 Dual SVF

  1. brunob

    I just finished this and I’m really happy with how it sounds..State-Variable really has a different vibe to it.
    I used the feedthrough circuit described in the Electro-Music Engineer to feed the Cutoff and Q pins, a 47K from pin 16 to pin 1 for the reference current, and the rest from the datasheet.
    Btw there might be a typo there as pin 15 is marked “VCF1 Lowpass Output” where it should be “VCF2 Lowpass Output”
    Thanks a lot for this 3350!

  2. patrick (verified owner)

    For replace CEM3350 with AS3350 in a Chroma Rhodes you can replaced the R45 / 46 (38.3K) with 30K resistors.

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