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." <five@sys6626.bison.mb.ca>
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.
