Synthrotek Sequence 8 User manual

Sequence 8 - Testing Procedures
Before you start this test, make sure that all knobs on the Sequence 8
have been rotated fully counter clockwise and that all 3 toggle
switches (Hold Hard, Clock Switch, Random) are in the down position.
—TESTING CV OUTPUTS—
When you first turn on the Sequence 8 it!should!be running on its
internal clock. Let’s make sure that all 3 CV Outputs are working
correctly. !Begin by plugging in a cable into the Sequence 8’s CV 1
Output and plug the other end of the cable into the 1V/Oct Input on an
Oscillator, and make sure to monitor the output of the oscillator.
Since all 8 of the sequence knobs are rotated fully counter clockwise
and the CV 1 input is set fully counter clockwise, you should get a
stable tone out of your Oscillator.
Rotate Step 1’s knob fully clockwise and leave the CV 1 attenuator set
fully counter clockwise. You should still get a stable tone out of your
Oscillator when it passes the voltage for Stage 1. If the Oscillator
changes pitch even though the CV 1 Attenuator is turned down all the

way, then you might have built the Sequence 8 with unleaded solder,
which we recommend against doing at the very top of the Assembly
Instructions.
Flip the HOLD HARD switch into the “UP” position and press!the red
STEP!switch!to reach Step 1 on the Sequence 8. From your
Oscillators resting position you should notice the pitch change 5
octaves as you rotate the CV 1 Attenuator from fully counter clockwise
to fully clockwise.
Repeat these same steps for the Sequence 8’s CV 2 and CV 3
Outputs. While you are plugged into the CV 3 Output,!press the STEP
button to advance to Step 2. Rotate the Step 2 knob clockwise and
confirm that it is also going to 5V. Do this same thing for Steps 3
through 8.
You should be able to confirm that all 8 steps can pass a minimum of
0 volts to a maximum of 5 volts and that all 3 CV Output Attenuators
are working correctly. Now Flip the HOLD HARD switch into the
“DOWN” position.
—TESTING CLOCK IN / CLOCK OUT—
TESTING INTERNAL CLOCK:
Slowly rotate the RATE C (Course) knob until you notice the pattern
going quite fast. Now rotate the RATE F (Fine) knob from fully counter
clockwise to clockwise. You should notice that the RATE F knob will
make fine adjustments to the internal clock and that the RATE C knob
makes course adjustments. When both knobs are rotated fully, you
should see all 8 LEDS for all 8 steps light up. It doesn’t go quite into
audio range, but it does go pretty fast. !Now hold down the red HOLD
MOM (Hold Momentary) switch and you should!notice (via the LEDs
on the front panel) the sequence has stopped at one of the 8 steps.

TESTING EXTERNAL CLOCK:
Flip the CLOCK SWITCH into the “UP” position. Using an external
clock source, the Sequence 8 can go a bit into audio range
(somewhere above 1kHz). Test this by plugging in an external clock
source or square wave from an LFO and run it into the CLK IN jack on
the Sequence 8.
Monitor the CLK OUT and turn the LFO /Oscillator / Clock Generator
up as high as you can and you should hear an audio pitch. Now
monitor one of the CV Outputs and make sure its Attenuator is set fully
clockwise. Set some step knobs up the right way and you get some
crude wave shaping sounds! Now!flip the CLOCK SWITCH into the
“DOWN” position.
TESTING RANDOM:
While the Sequence 8 is running on its internal clock, flip the
RANDOM switch into the “UP” position. Slowly rotate the RNDRATE
(Random Rate) knob clockwise until you will notice the (via the LEDs
on the front panel) the sequence start to move around randomly. This
random behavior acts subtly at lower settings and will great faster as
the knob is rotated clockwise. NOTE: This does not effect the CLOCK
OUT. Now flip the RANDOM switch to the “DOWN” position.
TESTING RESET:
While the Sequence 8 is running on its internal clock, press the red
RESET switch and you should notice the sequence resetting back to
Step 1
Now plug in a cable into the RESET output and plug the other end into
Step 2’s Reset input. The sequence should be holding on Step 1.
When you plug into Step 3’s Reset input, it should be holding on Step
2. Step 4’s Reset input should!hold on Step 3. Step 5’s Reset input
should!hold on Step 4. Step 6’s Reset input should!hold on Step 5.
Step 7’s input should hold on Step 6. Step 8’s Reset input should hold
on Step 7.

At this point you should be able to confirm that the Sequence 8 is
working correctly. If not, go back through your soldering and double
check your connections. If you need more assistance, utilize
Synthroteks troubleshooting guide or reach out to us via our contact
page and maybe we can point you in the right direction.