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AM3350 Module - Dual Resonant Filters
Overview This rather unusual module is designed around the forgotten CEM3350 chip, which was introduced as late as 1984.
It appeared in the ARP Chroma analog synthesizer, as
well as a few other mid 80's designs. It contains two state variable filters which have a great sound. I managed to find a couple of these chips in the USA in 2003.
AM Circuit The AM3350 module is based around the Digisound
modular design, which is already set up for modular signal levels (10V). Whilst the Chroma filter would be cool to clone its configured for lower audio levels. I have added low pass mode to the band pass approach in the Digisound design.
Panel The front panel is a standard 135mm wide AM design with 3mm aluminium, 4U high, with black lettering. Controls knobs are standard Eµ Modular designs.
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* CEM3350 