From five@sys6626.bison.mb.ca Sat Apr 9 23:16:25 1994 Date: Sat, 12 Mar 94 16:19:44 CST From: "A.R.F." To: analogue@magnus.acs.ohio-state.edu Subject: For sale - Korg SQ10, the modular analog sequencer. Features: 3 Channels with 12 steps of Control Voltage output Channels A & B can be chained together to form a 24 step sequence, and are switch selectable between -5/+5 Volts (output from each step, controlled by each steps pot) or -1/+1 volt ranges. Trigger output on each step for individual triggering from steps or for inputting back to the sequence restart input, for make sequences from 1 - 12 steps long. Channels A & B also have their own individual Portamento controls. Multipe trigger output, that sums all of the 12 step trigger outputs to 1 jack. 2 input/1 output analog mixer Voltage controllable clock speed Step time programming control for adjusting the tuning of each pot in each step, for precise control over controlled parameters of the machine being sequenced. (Being a sequencer with Pots on the outputs, there are no fixed voltages, (as in quantized steps) so the sequencer can be used to control: 1V/Octave VCOs and VCFs; Linear VCOs and VCFs; VCAs; Triggering ADSRs and on and on and on. The Triggers are of the +5V = OFF / 0V = ON type. For working with machines that have 0V OFF / 5V ON triggering, the SQ10 can be first put through an inverter and level adjusted to work. There is no Din sync on this machine, but it's a simple matter (for someone with a soldering iron) to build a converter output of 1 opamp (a 741, say) to convert Din sync output to trigger the clock of the SQ10. (This is how I used to sync mine to Din sync (and hence, to MIDI through my Din to Midi sync converter). I'm not using the SQ10 any more though, so I've decided to sell it. I'm looking for $200 CDN / $150 US or best offer, OR a trade on gear of equal or near value. Email or post to Analog Heaven. I'll get it, either way. Five (Thanks to Steven Collins for the loan of the SQ10 !! 8-)) Here's what I know of the Korg SQ10 : - 3 X 12 Channel Analog sequencer, pot adjusted. The pots are a *nightmare* to set up. Each note has to be individually tuned. Channel 3 is normally reserved for the note length. - Channels 1 & 2 are effectively connected to a single CV/Gate output. A switch allows the sequencer to sequence these channels in a few different ways : (1) Channel A . Stop (2) Channel A Channel B Stop (3) Channel A channel B Channel A Channel B ..... free-running (4) (5) (6) All the above, except single-stepped with a push button. This is most useful for tuning each note. Channel C runs in time with the other two channels. It's CV output can be routed to the sequencer clock CV input, effectively controlling the on-time for each note. This means that the note on time for note 1 of channel one is the same for not 1 of channel 2. - Beside the sequencer mode switch is the (large) Tempo adjust knob. It can be made to run *very* fast!! - Gate signals can be extracted for each note, the idea being that the last note of your sequence Gate signal is sent to the reset input, thus defining the sequence length. - There is a portamento knob for each of channels A and B. Both channels have a +-1V , +-5V switch, for switching the range of the two banks of 12 pitch knobs. - Duty Cycle is adjustable (1 knob only) for the gate output signal. - The sequence can start/stop from an external foot switch, or single-stepped. - The instrument itself, is about 14" wide, by 8" high and 4" deep. It's black, with white lettering, and there are three distinctive rows of 12 knobs across the front of the instrument. - Input / Outputs (as far as I can remember) : CV out. Channels A & B gate out. 12 Gate out signals (for each note) Reset Sequence input. Sequence start/stop input. Tempo input (CV). Single step input. - There's a neat little 2-channel mono mixer built in. This is accessible from three 1/4" jacks on the front panel. It just sums the two inputs and sends them out. I think this is about it. Everything, including sockets, is on the sloping front panel of the machine. It also has a neat bunch of LEDs, one for each note of Channels A and B (none for C). There's a tempo LED, too.