Hearn Morley VCO, VCF,ADSR modules

adambee7 · Joined: Apr 04, 2009 Posts: 420 Location: united kingdom

Just wondered if anyone has built anything from the modules available from Hearn Morley?

https://sites.google.com/site/hearnmorley/home

ashleym · Joined: Aug 20, 2009 Posts: 157 Location: uk

Have a look at Muffs

http://www.muffwiggler.com/forum/topic-54357-.htmlall&postdays=0&postorder=asc&sid=5914464a0e7076bb58cde9b6b79f04e3

Frequency Central is putting together some boards for these

frequencycentral · Joined: May 25, 2008 Posts: 185 Location: UK

Yeah I have built a couple of HMVCO1c modules, really easy build and a very stable workhorse VCO. I added a 4024 to give -1 oct square, -2 oct square and a couple of diodes to give -2oct pulse - all opamp buffered too.

My layout is pretty cool, but a originally went with just a coarse tune knob and a +1 oct/normal/-1oct toggle, it really needs a fine tune too, so I gotta do some revisions...

The challenge of doing a run of these is stumping up the initial amount for to get a decent price break for a bulk order of chips.

I've got a couple of the VCF chips too, planning to do a Prophet style filter when I get time.

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