As requestedCat-A-Tonic wrote:How about giving us the details about said mods and bastardizations in a new thread?DGTom wrote:I really like my Klang Voice.... which is a bastardized, modded to all hell Klangwerk, I rewired its insides so it operates as seperate balanced modulator, VCO & wave shaper.
Pretty please; with sugar on...
First off; all the usual disclaimers apply, mod at your own risk, warrenty goes out the window etc. etc.
I'll add to that these mods shouldn't be performed if a) you already like the KW as is b) you don't have and/or aren't familiar with the schematic.
Before starting take the time to really study & understand the innards of the Klangwerk, there's lots going, a few expensive parts & you really want to be sure that once you start you know what you are doing. That being said, one of my main aims in performing these mods was that they were 100% reversiable, everything can be un-done & it doesn't require any major chnges to the PCB.
The main caveat; you lose the ability to have an AC coupled balanced modulator, we're going to remove that switch & re-use part of the cct. to do another job, so, if you need / want AC coupling in the KW, then these mods arn't for you. This wasn't a problem for me %80 of the time I use this module as a turbo charged VCA because I love the gain on the input & the Mix knob on the output.
So, lets look at the changes to the panel;
As I said, the switch for AC / DC on the carrier is gone. In its place is the output for the internal Carrier VCO. By removing S1 we get access to the output of the internal Waveshaper @ S1-3, this gets its own output on the panel.
In order to get signal into the waveshaper 2 capacitors have to have one leg lifted, wired together & connected to a socket on the panel;
Its not pretty, but, it does the job.
This connetion is made as a track on the PCB, but we're using that for something else now.
this pic shows the back of the S1 pads. The blue wire has a 1K resistor in line with S1-1, more of that later. The purple wire is connecting the track that usually feeds those 2 caps to S1-2, fast tracking the Ext. Carrier signal into the AD633, bypassing the wave shaper which now has access on the panel.
That blue wire is the output of section A of IC1, a basic inverting amp with 0 gain, I've used this to buffer the output of the 8038 function generator that is used for the Internal Carrier VCO.
You get access to this signal at a via underneth one of the trim pots;
The via is tiny so I soldered a thin resistor leg in there & soldered the wire onto that.
Then R17 gets one leg lifted & the VCO goes into the op-amp;
Again, not real pretty.
One thing I still need to do, I'm an idiot for not doing it to begin with, is tack an attenuator onto the waveshapers CV input.
Hope this is of use to anyone else who, like me, wished they could use each part of the KW for differant jobs. I really like the waveshaper, which is similar in some ways to the old Serge waveshaper, based around the LM3900. I also find it really usefull having another simple VCO, even tho its not that the best at low frequencies, great if I need a simple FM source or a percussive noise.
& here's a cheap & nasty demo of the 3 differant sections, one at a time then all together.
first 30secs is a tri from the Blacet VCO into the waveshaper, please excuse the silences / cable clicks, this was an afterthought I didn't have time to edit it down. Anyway, after 30secs is the Internal VCO, by itself, then CV'd by a Binary Zone. You can hear it shit itself when the CV goes to low; I'm a big fan of clicks & pops so this is no big deal for me, I think of it as a mid/hi VCO.
Then I switch to the Main out, external / internal carrier, using the waveshaper on either / or etc. etc. One thing that is really cool is the internal envelope follow can really freak the VCO out, its lots of fun to FM a VCO with the KW VCO, then feed the FM'd sound into the ring mod, using the waveshaper on an oscillator that is feeding the Folds CV on the CGS Wave Multiplier is good value as well