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 Forum index » DIY Hardware and Software » Lunettas - circuits inspired by Stanley Lunetta
The new (up'n'coming) 4 Corners of Your Mind module ......
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Rykhaard



Joined: Sep 02, 2007
Posts: 1290
Location: Canada

PostPosted: Thu May 21, 2009 12:29 pm    Post subject: The new (up'n'coming) 4 Corners of Your Mind module ......
Subject description: a short example of 1 of it's 2 joysticks controlling pitches
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This is a short (just over 1 minute) sample of my current bread boarded new module for my noise machine.

This module - 4 Corners of Your Mind - is a cross between the 4093 NAND Synth and 2 of synthmonger's CD40106 Sawtooth VCOs, along with 2 more 40106 oscillators.

The 4 oscillators are hooked up in various ways for modulating each other, somewhat similarly to the 4093 NAND synth.

The module has 4 output buffers. Each of them have strongly different harmonic content sounds.

This sample that I've included is a short example of 1 of the module's 2 joysticks, controlling the pitch of both Sawtooth 40106 oscillators.

Hope you enjoy. Smile More samples from the test unit are in the audio section at my site, if you're curious.
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amplex



Joined: May 26, 2008
Posts: 64
Location: sacramento, ca
Audio files: 6

PostPosted: Sat May 23, 2009 9:03 pm    Post subject: Reply with quote  Mark this post and the followings unread

do you opamp your nand synth signal? im getting a very low voltage from the one i have on breadboard, chip is MC14093BCP.. im getting .1-.2v from the first gate output on pin 3 (8.2v power supply). is this normal?

really gritty fm sounds =D those are saw waves? hard to tell when they are smashing into each other so hard =] with some filtering this would sound nice.. im putting a little switchable RC lowpass in this noise box, found that a 2.2k/.1uf cap seemed to work nicely while not cutting the volume too much!

id actually like to have a switchable lp/hp filter on each 'channel' made up of 2 syncd nandgates..maybe even 2 audio outs for that! with a fine tune on the oscs for a slight chorusy sound, been getting a few cool sounds like that out of the lunetta lately =B as soon as i have another synth for more tone i will be patching the pulse outs into the lunetta, more patchable clocks, seq cv out, glide, >=D might take me another day to get this finished tho, unsure on amping my signal from the nand gate, i will probably do a tl072/lm386 circuit as thats all i have right now

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amplex



Joined: May 26, 2008
Posts: 64
Location: sacramento, ca
Audio files: 6

PostPosted: Sun May 24, 2009 2:20 pm    Post subject:  verdict: nand synth needs opamp Reply with quote  Mark this post and the followings unread

ok i used a lm386 and it sounds great!!! on the 2 nand synth schematics i have, neither one had an opamp.. but the 50 gain amp works great off the 386 datasheet! sounds nice too with a lil gain, & very simple, low parts count, for caps: .05uf (i used 2 .022uf), 100uf, 250uf (i used 200uf). for resistors, 450k (i used 470k) and 10ohm which i used a 15 and the thing sounds sweet. also for the feedback gain i used a 10k with a 10uf cap, and also used a 10k pot for pre-gain. gonna finish building this tonight, will post results!!!
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