MOTM ZO first report
2006-02-03 by mate_stubb
Howdy all, I received my MOTM ZO a couple days ago and am reporting in with my initial impressions. Appearance/build: This thing is big and beautiful. It is a perfect cosmetic match for the factory MOTM modules (something not always achieved by others - for example, the Encore Freq Shifter). The sandwiched system of 3 main boards and multiple panel control boards is elegant and completely eliminates hookup wire for the panel controls. This is an interesting solution to the problem of offering multiple formats at a relatively low volume. The jacks are switchcraft, but not the 112As that MOTM users are used to. They look much the same, but have different lugs to mount to the PCB. They have a heavier engagement feel than the 112As. The pots are smooth feeling with a slightly more damped feel than standard bourns pots. The multiturn tuning control is smooth and light feeling. You can spin it around with a single finger. I found precise tuning to be easy and quick. Features/functionality: Well, it's simply the most full-featured VCO I've ever seen! Linear through zero FM with built in VCA, 5 basic output waveforms, 4 aux outputs in quadrature with wave shapers, etc. Everything works as advertised. The only tiny complaint I have is that the waveform morphing doesn't match the pot positions with the panel graphics. Just use your ears and you'll find where it hits the sine wave sweet spot. The variable strength sync works very well, and allows you to achieve effects from stepping harmonics to a severe "tearing" from one harmonic to the next, to an even more severe octave jump effect I had never heard before. Very musical. Having a built in VCA to control the FM modulation amount is very handy. It makes it easy to achieve enveloped modulations for struck metallic sounds using only an external EG. I've had great fun using it as a LFO with the quadrature outputs driving 4 separate VCOs. Using rectified square waveforms I can get swooping trills in 4 part harmony, very cool! Sound: The basic sound is very clear and pure. I put a scope on all the basic output waveforms, and they are pristine. This module has that characteristic very pure sine wave output that you cannot get with a sawtooth core VCO. This of course is the perfect starting point for linear FM. Until now, the only way I could get that sound is by using an oscillating VCF, which typically doesn't track the keyboard as well as a real VCO. I'm still exploring the huge palette available for FM. It's going to take a lot of playing to get my head around all the modulation capabilities of this oscillator. Suffice it to say that the pure inherent waveforms coupled with the extreme amount of modulation possible make this sound different and more radical than anything else in my system. Major kudos to Cynthia and crew for taking the gamble and succeeding in bringing a premium module like this to synth lovers everywhere! Moe http://www.stoogeindustries.com