User Manual

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.

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

Top Tip: Make editing of vowel sounds trivial by using the Wahoo Desktop Editor. This

gives you a graphical representation of the vowels so you can simply drag the

filters to get any vowel sound you desire, quickly and easily.