Owner’s manual, User modifications of the wahoo, Filter calibration – Peterson Sonuus Wahoo User Manual

Page 28

Wahoo

Owner’s Manual

User modifications of the Wahoo

For the avoidance of doubt, opening any part of the Wahoo other than the battery compartment will
always cause your warranty to be invalid.
However, we realise that musicians sometimes make the minor modification of reducing the
footpedal travel by sticking a piece of rubber under the front (heel position) of the footpedal. If you
do this, you will need to follow the pedal calibration procedure below (page 29). Any damage caused
to the Wahoo deemed by sonuus to be caused directly or indirectly by this (or any other)
modification will not be covered by the warranty.
The rubber stop at the back of the footpedal (under the toe position) should never be modified to
avoid damage to the pedal sensor.

Filter calibration

The Wahoo uses analogue filters and a pure analogue signal chain. These analogue electronics can
be sensitive to temperature changes. To ensure presets continue to sound the same each time you
use them, and so you can exchange presets with other Wahoo users and get the same sound, the
Wahoo uses temperature-compensated calibration. Calibration has been done in the factory before
you receive your Wahoo, but you may want or need to adjust this, for example if you are using the
Wahoo in a particularly hot or cold environment.
Calibration has the best results if the Wahoo has been on for at least ten minutes so it can warm up
to a stable temperature. If you calibrate the Wahoo in a warm room straight after you have brought
it in from a cold car, the calibration may not remain accurate as the Wahoo warms up.
For calibration, the Wahoo outputs a tone by making the filters self-oscillate. To see this tone you
need to connect the output of the Wahoo to a tuner that can tune 880Hz (A5). Enter calibration
mode by simultaneously pressing and holding the

FILTER

button and the

FILTER

knob for 4s until

CAL

is displayed. Now adjust the

FILTER

knob until the output of the Wahoo is 880Hz (A5). Press the

FILTER

button and do the same for the other filter. To save the calibration and exit calibration mode,

press the

save button. Alternatively, save and exit calibration mode with another simultaneous press

of both the

FILTER

button and the

FILTER

knob.

If you enter calibration mode accidentally and want to exit without saving, press and hold the

save

button to cancel.