I can't help myself...
http://www.flickr.com/photos/87190215@N ... 532744615/
There's a bit more information included with the photos.
What does it sound like?
Well I guess it still sounds like a Micro-preset but with just a whole lot more control. The basic filter design is more or less the same but I added the VC-Q part from a PS-3100 to allow me to vary the resonance from the new front panel.
The additional electronics in there is for a beefier power supply, the two new EGs and VCO output buffering for the Synthe section. The empty op-amp socket is for further additions that may or may not be added at a later stage.
I'll pop some sound samples up at some point.
Tony
Modifying a Korg Micropreset
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- KVRist
- 411 posts since 17 Mar, 2005 from Cumbria, England
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- KVRAF
- 8114 posts since 13 Jan, 2003 from Darkest Kent, UK
That looks great, I was going to say very professional but then I suppose it should be. 
In my utter ignorance, how do the presets work on a synth like that? I assume nothing digital in there so is it literally lots of multiway switches with different components etc hardwired to create the different tones?
In my utter ignorance, how do the presets work on a synth like that? I assume nothing digital in there so is it literally lots of multiway switches with different components etc hardwired to create the different tones?
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- KVRist
- Topic Starter
- 411 posts since 17 Mar, 2005 from Cumbria, England
Pretty much. Each of the push buttons on Micropreset are associated with a set of components for one sound. There's a separate VCA, filter and envelope for each one. But it's basic stuff so the sounds themselves, with the exception of the Brass and Synthe, are very simple. You can, however, stack them up in parallel.GaryG wrote:... so is it literally lots of multiway switches with different components etc hardwired to create the different tones?
The brass and the Synthe have a VCF as well as a VCA. They even have some sort of simple envelope control. The mod extends this considerably.
Some older preset synths like the SH-2000 are actually full blown monosynths but instead of having a full set of controls on the front panel they change the synth's parameters using a hidden matrix of resistors and diodes selected by a set of switches - one switch for one sound. For the most part on those type of synths the audio pathway is the same regardless of sound. You can't tend to stack sounds up since only one sound can normally be heard at a time.
Tony
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- KVRAF
- 1870 posts since 21 Feb, 2004 from somewhere! anywhere!
Wow!That's awesome and inspiring. I'll look forward to the audio samples...I have a Korg Sigma - it has a number of controls over the sound but I've often wondered what could be done to the circuits to increase this further. Unfortunately, my expertise doesn't stretch beyond polishing the wooden end cheeks. You can stack all the presets for a monster noise though!