SoundTraxx Tsunami Steam Users Guide - Manual (Page 41)

Tsunami Steam Sound User’s Guide Page 38
Think of these CVs as slider control
like those you might find on the
front of an equalizer for your home
stereo. Each CV may be programmed
between 0 and 255. A value of 0
corresponds to full cut or -12dB*. A
value of 128 corresponds to moving
the slider to the middle or 0dB (no
effect) and a value of 255 corresponds
to full boost or +12dB. Table I shows
CV settings for common boost/cut
levels.
The graph below depicts the minimum and maximum frequency response for
each of the seven CVs. Note that there is some overlap so adjusting one CV
will raise or lower sounds with nearby frequencies as well.
The easiest way to set the EQ is to simply use your ears and adjust the CV
settings while the sounds are playing. Starting with the lowest frequency
band, adjust CV 154 up or down until you get the desired response. Then ad-
just the next band using CV 155 and so forth. Depending on the speaker you
have installed, you may find that the lowest frequency bands have or no little
effect. In this case, the audio frequencies are out of the speaker’s reproduc-
tion range and we suggest you set the corresponding CV to 0 (i.e., full cut).
*For those not familiar with dB, it stands for decibel. Every +6dB change
represents a doubling in the audio signal while a -6dB change is the same
as cutting it in half. Thus a +12dB increase quadruples the signal level and
-12dB cuts it in fourth.
Sound Programming
dB Value
+12 dB
+9 dB
+6 dB
+3 dB
0 dB
-3 dB
-6dB
-9 dB
-12dB
CV Value
255
224
192
160
128
96
64
32
0
Table I. Using The Equalizer
CV V
alue
255
128
0
62 125 250 200 1K 2K 4K