via nikseven in this gearslutz thread via the AH list."has anyone heard of this company? is it an actual company? i bought this midi-cv converter used a couple months ago, and it was d.o.a., but i would like to get it up and running. i can't seem to find any info at all about Y.E.S., and i'm wondering now if it is just a kit that someone slapped their own faceplate sticker on (it kind of looks like it). and if it is a kit, can anyone identify where it may have come from, or if it resembles something that another company manufactures? sorry about the crappy phone photos."
Update via Lorne on AH:"In 1989 I wrote to Chris Yewell and was on his mailing list. Yewell Electronic Systems (YES) were in Chagrin Falls, Ohio.
The MIDI-955 pcb board (gave velocity and pitch, 5V or 10V trigger and gate outs (the 5Vs are also available inverted), an S-Trig out for Moog. It had separate DAC for pitch (0-10V, last note infinite hold for pedal notes) & velocity (0-10V) to avoid "droop caused by sample and hold circuits." (?). There is a velocity low High output that brakes at 64-127 which allows for velocity to also be used as a switch. Channel is set internally by dip switch.
You could buy one for $149 (9.5"x 5.5", needs +/-15V and +5, all less than 50 ma) to install. It has a 14 pin sockets to expand pitch bend out and aftertouch. The other (16 pin) socket is for timing and system data. There is a stuck note reset push button option, or hold 16+ midi notes down, which shifts the gate to reset. But its a Linear 1V per octave, there were no hertz options.
The factory rack was the YES B4 MIDI to control-voltage Interface 19" rack also added bend voltages -2.25V to +2.25V (a major third) and a combo bend and pitch out for single cv in synths. He also added a 3080 (OTA) based vca for processing vintage synths with no vca access points. His bender had no zipper noise. It was $299.95 with an internal ps. That is what is in the images on the link.
He also sold the XYZ 818 experimenter's pcb which is 16 outputs of midi to triggers (also available inverted) to drive combinations of (with additional DIY circuits) pre-midi drum machines; sequencers; adsrs; mechanical relays for motors, strobe, smoke machines, lasers, slide projectors; solid state relays (motors); drivers for solenoid switches for percussion.; analog switches ; and an early digital pot for fading audio (E2POT, Xicor Inc.). he was a Mac kind of a guy.I have a sales drawing of the pcb showing what is where generally on the board but it shows no components/traces/or schematics, sorry. Lorne in Canada"
