9) Calibrations 10) Calibrating the ENV CV out
11) Calibrating the PITCH CV out
Sonicsmith 2023 ConVertor E1 User Guide - Firmware 1.0 Sonicsmith 2023 ConVertor E1 User Guide - Firmware 1.0
Sonicsmith 2023 ConVertor E1 User Guide - Firmware 1.0 Sonicsmith 2023 ConVertor E1 User Guide - Firmware 1.0
12) Calibrating the FM / unison
ENV offset
FM IN
(Unison adjust)
ENV offset
Pitch DC offset
Pitch scale
ADC differential
offset
Pitch DC offset
Pitch scale
The ConVertor E1 is shipped
calibrated and ready to play. But
aer a few years (or aer accidental-
ly touching the trim-pots), there
may be a need to calibrate them
again. For calibration you will need a
sound source of known frequency
(we use 100Hz and 800Hz tones), a
voltmeter with 3 decimal precision
with a probe-to-mini-jack cable. The
next sections will take you through
the calibration procedures of the
different parts and why would you
think you need one. It’s better to
make sure you need it before you
start. In any case there is a problem,
please contact us at:
If you are controlling an external synth
with the ENV CV output but when you
stop playing you still hear the external
oscillator in low volume, you may
either suffer noise from your audio source or there
may be a need to calibrate the ENV CV output.
Follow the next steps to calibrate it:
1) Unplug the audio input, set gain to minimum
and make sure the HI Z LED is off.
2) Plug the Volt meter probe’s mini-jack to the
ENV CV out, and set the V-meter to DC
3) Turn the ENV offset trim-pot until the V-meter
shows 0V
If you press the top encoder to
tune back to unison but the pitch
of the int. synth does not tune to
the same frequency of the audio
input, you may need to tune the unison point. Aer
tuning the unison point, the FM input should also
be unison when receiving a 0V DC source (0V CV
signal). To tune the unison, do the following:
1) Disconnect the FM IN from any cable
2) Press the top encoder to go to unison
3) Make sure the Q LED is off
4) Listen to your source audio and SYNTH out
side by side to hear your tuning
5) Turn the “FM in/unison adjust” trim-pot until
you hear the audio input is in tune with
the SYNTH output
6) Press Q to turn the Q LED on/off to make sure
both stay in the same pitch
If you control an external synth with
the pitch CV output and the tuning
accuracy change across different
octaves, you may need to calibrate the pitch CV
out of the ConVertor E1 (the receiving synth may
also need calibration). Follow these steps:
1) Patch the tone source to the audio input
playing 100 Hz
2) Plug the V-meter mini-jack probe to the
PITCH CV out and set it to DC
3) make note of the value and change the tone
source to 800Hz.
4) Turn the pitch scale until the difference
between 100Hz and 800Hz is 3V. If needed,
repeat 3-4, until the diff. is 3V.
5) Aer that, play 100Hz and turn the DC offest
until it shows -
FM IN
(Unison adjust)
+
-
