EML ElectroComp 101 – 1 volt per octave conversion mod

Update, 8/2019: we are now selling PCBS and kitsf that make it easy to install this mod! Click here for details.

This is a really fun synth! EML was a lesser-known American synth company competing with Moog and ARP during the 1970s and made some unique instruments. The EML-101 is a semi-modular duophonic synth similar in structure to the ARP 2600 and very unique and powerful. The bulk of our work on this involved designing and installing a circuit that allows the synth to accept standard 1 volt per octave-scaled CV via its “SEQ” input, as its oscillators have an unusual scale of 1.4 V/octave with a 4.6-volt DC offset. Continue reading “EML ElectroComp 101 – 1 volt per octave conversion mod”

Korg Poly 61

Korg Poly 61 synthesizer
Korg Poly 61

This synth sounds FAT. It’s architecture is really simple, but it sounds really good. I can’t think of any 80s polysynth that is better at making fat, Moog-ish leads and basses.  Six voices of a patch like that sounds absolutely huge.  It has the 4 way joystick shared by the whole Korg “Poly” series which effectively gives you an extra (analog-controlled) LFO. The oscillators have a lot of low end and can sound really fuzzy, like Big Muff fuzzy.  It has a simple arpeggiator that allows you to tell it to run your arpeggio up and down the whole keyboard.  If you trigger an arpeggio by playing several notes in different octaves, it will alternate steps above each of them as it arpeggiates, allowing you to make some complex, interesting sequences. Continue reading “Korg Poly 61”

Sequential Circuits Drumtraks

This was for producer Gino Wong of ReRed Recording, but I was excited to get it working for my own reasons, so that I could sample the drum sounds into my Electribe. Once I did get it working, I discovered that the SCI Drumtraks is super easy and fun to make beats on! I didn’t know this before, but the sounds on here are not synthesized, but rather are low-fi samples each on their own EPROM. Continue reading “Sequential Circuits Drumtraks”