Future Retro Orb Owner Manual - Manual (Page 28)

CALIBRATING THE ORB’S CV OUTPUT
The Orb provides a single access hole on its bottom chassis for
calibrating the CV output. This trimmer is set at the factory but
may need to be adjusted over time.
To make adjustments to the trimmer, we recommend using a small
flat-blade screwdriver.
Before making any adjustments, turn the unit’s power on and let
the unit warm up for at least 15 minutes.
You may find it easier to calibrate this trimmer by setting the Orb
on its side on a soft surface so you have access to the front panel
controls and the bottom trimmer access hole at the same time.
First create two different patterns, each containing only one note.
The first pattern should be programmed to play a pitch of C1, and
the second pattern should play a pitch of C6.
Make sure that the Orb’s Xpose setting is set to “0.”
If you have a voltmeter, plug a short 1/4" cable into the CV Out
jack and connect the leads of your voltmeter to the other end of the
1/4" cable. Play the pattern containing C1 and check the voltage
being generated. Play the pattern containing C6 and adjust the
trimmer until the voltage generated is 5 volts higher than that of
C1. You may need toggle back and forth a few times, checking the
voltage of C1 and then adjusting for C6 until the difference is
exactly 5 volts.
If you don’t have a voltmeter, connect the CV Out and Gate Out to
a 1V/Oct synthesizer that is properly calibrated. Play the two
patterns containing C1 and C6 while adjusting T1 until the external
synthesizer plays the correct scaling. A slight adjustment is usually
all that is needed.
Note: This method is not as accurate as using a voltmeter.
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