One of many things that the MKS-80 is really good for is creating synthesizer effects. Through the use of the XMOD (cross modulation) parameters strange, metallic textures can be obtained similar to FM or frequency modulation. As heard in the Synthesizer Noise Jam series , I’m discovering a variety of ways to use these techniques to create unique and fascinating effects perfect for electronic music, or scifi thriller sound tracks. Here’s a short segment from one of these experiments processed through reverb and delay.
After working out a new MIDI control scheme for the MKS-80, I decided to take a closer look at the cross modulation section. After reading the article in Sound on Sound that I discussed in Cross Modulated Microtonal Improvisation I thought it would be a good challenge to try and create some “clangorous bells”. It took me a little bit of trial and error, but I programmed a couple of bell-like patches that are pretty damn clangorous. Here’s the more clangorous of the two. They sound very analogue, weird, and more bell-like in the upper versus lower register, almost like something off a Tomita record. I added a bit of stereo imaging and reverb to liven them up a bit.
I created this plucky microtonal patch by using the cross modulation on the Roland MKS-80 to effectively put the instrument into an instable, out-of-tune state. I mentioned in my previous entry that cross modulation is a form of frequency modulation or FM synthesis made famous by the Yamaha DX-7. My curiosity about this technique led me to an article in Sound on Sound from 1994 titled Exploring Analogue (Part 2) by Steve Howell. In the article Howell states,
“…take the output of one oscillator (Osc A) and feed it into the control input of another (Osc B). As the modulation level at Osc B’s input is increased, so its tonal quality becomes progressively nastier. In fact, in the absence of a ring modulator, cross-modulation can be used very effectively to create clangorous bell sounds and the like. But be warned! Because the tuning stability on old analogue synths leaves much to be desired, the oscillators don’t track too well, and a sound that is perfectly tuned on C3 may well have disintegrated by the time you get up to F3.”
On the Roland MKS-80 the tuning stability is pretty good, but it does use VCOs (voltage controlled oscillators), so they won’t track as well as DCOs (digitally controlled oscillators). This imperfection is part of what many of us find attractive about analogue synthesis, and what made it possible for me to produce this bizarre, out of key, yet delightful sound.
This dissonant microtrack was created on the Roland MKS-80 with MIDI mapping on a Korg nanoKONTROL for real time manipulation of the settings. I setup three scenes on the nano to control virtually every parameter, although I was only adjusting a few of them for this recording. What makes this patch so interesting to me are the opposing oscillator frequencies. I managed this by routing the LFO to the VCO and by using cross modulation, which are settings on the MKS-80 that I’m just starting to get familiar with. Everything else on this machine fits snuggly into the subtractive synthesis model, but the cross modulation uses the second oscillator to modulate the pitch of the first. This can be used to produce FM or frequency modulated sounds including bell like tones similar to what the famous Yamaha DX-7 was doing around the same time.
Cableguys.de have recently released an excellent community-driven software synthesizer called Curve (downloadable demo available). The synth has three, aliasing-free oscillators, three five stage envelopes, two filters each with ten modes, and four LFOs that are either, beat, note, or frequency synced. One of the coolest things you can do is draw your waveforms in the editor. You can even randomize them for some interesting results. Here’s a sequence that I created and recorded without any processing using Curve. This is one of my first attempts at creating a patch in Curve and I shared it to the preset community (available within Curve’s interface) as Bouncy Arpeggiator by AudioCookbook. Stay tuned for a lot more from this powerful and great sounding software synth.
