Calibration; Firmware Update Procedure - Mutable Instruments Tides User Manual

5/3/2018
The Shape control offers a different set of waveshapes, chosen so that they are perceptually different from
each other when played at audio rates.
The Slope control behaves in a more linear way, producing a sound reminiscent of PWM when modulated. In
the low and medium frequency ranges, it has an exponential-like behavior allowing the creation of curves with
very short attacks and very long decays (or vice-versa).
Amplitude scale/offset errors are more likely to occur in the high range - the reason being that smoothing has
to be applied to some sections of the waveform to prevent aliasing.

CALIBRATION

The module is factory-calibrated using precision voltage sources. Follow this procedure only if
you want to compensate for inaccuracies in your CV sources, or if your module has lost its
calibration settings following a fault or the installation of alternative firmware.
CV input calibration
This automatic procedure calibrates the V/Oct input (scale and offset), the FM input (offset), and the level
input (offset).
1. Set the FREQUENCY
2. Connect a patch cable to the
normalling to ~1 semitone to be activated).
3. Connect a patch cable to the
normalling to full scale to be activated).
4. Connect a MIDI>CV interface or precision voltage source to the
5. Hold the Mode switch (A) for one second. All LEDs are lit in yellow.
6. Play a C2 note, or send a 1V voltage from your CV source.
7. Press the mode switch (A). All LEDs are lit in green.
8. Play a C4 note, or send a 3V voltage from your CV source.
9. Press the mode switch (A).
The module is now calibrated for accurate V/Oct operation!
Bipolar output offset calibration
1. Remove any patch cable from the trigger input.
2. Set the mode to AD or AR (mode LED is red or green).
3. Set the range to medium (range LED is off).
4. Measure the voltage on the bipolar output. Adjust the trimmer on the back of the board so that this voltage
reaches 0V.

FIRMWARE UPDATE PROCEDURE

Unplug all CV inputs/outputs from the module. Connect the output of your audio interface/sound card to
the FM input (7). Power on your modular system with Tides' mode switch
blink, with a yellow color.
Make sure that no additional sound (such as email notification sounds, background music etc.) from your
computer will be played during the procedure. Make sure that your speakers/monitors are not connected
to your audio interface - the noises emitted during the procedure are aggressive and can harm your
hearing. On non-studio audio equipment (for example the line output from a Desktop computer), you might
have to turn up the volume to the maximum.
When you are all set, play the firmware update file into the module. The LEDs show a cyclic pattern and
periodically flash green upon receiving a valid block of data. The unit reboots after the last packet has
been received.
In case the signal level is too weak or too high, the procedure will stop and all 3 LEDs will be lit in red. Try
adjusting the output level, press the mode button and retry from the start of the update file.
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knob to its center position.
FM input. Leave the other end of the cable unplugged (this prevents the
Level input. Leave the other end of the cable unplugged (this prevents the
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V/Oct input.
(A) pressed. The 3 LEDs will
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