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Wahoo
© Copyright 2012 Sonuus Limited 25
Owner’s Manual
Creating vowel sounds
To create convincing vowel sounds, you need to use both Wahoo filters working together to produce
the characteristic frequency components of the desired vowels. The table below shows typical
cutoff frequencies that can be set on each filter to obtain each vowel sound. Note that these values
are approximate and are a good starting point. From here you can adjust the frequency and Q of
each filter and experiment to see what sounds most vowel-like to you. Also try configuring one filter
as band-pass and the other filter as low-pass to get variations of the sound.
How to use: to go from “ee” to “ah”, set freq-lo to the “ee” values, and freq-hi to the “ah” values.
MIDI
operation
It is possible to control the Wahoo with
MIDI
input or to use the Wahoo as a
MIDI
controller. For
example, the footpedal always sends 14-bit expression controller messages on
MIDI
channel 0 so you
can use the Wahoo to control synthesizers.
MIDI
can also be used to synchronise
LFO
s to your
sequencer to ensure their tempo matches that of your song, or to automate preset selection.
Connect the Wahoo to a
USB
port of your computer (
OSX
, Windows, Linux) via a
USB
cable connected
to the
USB
port of the Wahoo. The necessary drivers are part of the operating system so your
computer will automatically configure itself to work with the Wahoo. Once this is done, new
MIDI
-in
and
MIDI
-out ports will appear, named “Wahoo”. To send
MIDI
messages to the Wahoo, connect your
software to theWahoo
MIDI
-out port. To receive
MIDI
messages from the Wahoo, connect your
software to the “Wahoo
MIDI
-in port.
The following standard
MIDI
messages are supported.
MIDI
output (from Wahoo to computer)
Vowel
Frequency [Hz]
Vowel
Frequency [Hz]
Filter 1 Filter 2 Filter 1 Filter 2
ee 300 2700 i 400 2500
ah 800 1200 e 600 2300
aw 600 800 u 500 1100
oo 350 800 uh 750 1400
ae 800 2000 er 500 1600
MIDI
message Chan Description
Controllers
MSB LSB
Expression #11 #43 0 Always sent whenever the footpedal is moved.
25


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