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Sound Programming

being pushed about. If we turn up the volume, things will not likely improve much and what’s worse, the speaker cone will eventually be pushed against its physical travel limits resulting in annoying clicking and popping sounds.

This is where the equalizer’s ability to “cut” frequencies out becomes important. By removing the inaudible low frequency sound components, the speaker is now able to work more efficiently (i.e. louder) in the audio range it was designed for.

EQ Presets Using the equalizer begins with CV 153, the EQ Control Register. This CV may be programmed with any value between 0 and 7. A setting of 0 disables the EQ as if it were never there. Settings 1 thru 6 select a factory preset which tailors the frequency response to several of SoundTraxx’s more popular on-board speakers. The table below shows the presets and their equivalent settings which may be used as the basis for developing your own settings.

6

Micro Speaker < 1” Diameter

+6 dB

+3 dB

+1.2 dB

0 dB

+1.2 dB

+3 dB

+6 dB

192

160

136

128

136

160

192

Preset No.

Description

62Hz

125Hz

250Hz

500Hz

1Hz

2Hz

4Hz

0

Flat

0 dB 128

0 dB 128

0 dB 128

0 dB 128

0 dB 128

0 dB 128

0 dB 128

1

Micro Speaker < 1” Diameter

-12 dB 0

-12 dB 0

+7.12 dB 200

+3 dB 160

+1.5 dB 140

+0.8 dB 132

0 dB 128

2

Small Speaker 1-2” Diameter

-6 dB 60

-3 dB 96

+4.1 dB 168

+3 dB 160

0 dB 128

0 dB 128

+0.8 dB 132

3

Medium Speaker 3-4” Diameter

-3 dB 96

+4.1 dB 168

+2.3 dB 148

+1.1 dB 136

0 dB 128

0 dB 128

+6 dB 128

4

Large Speaker >4” Diameter

+6 dB 192

+3 dB 160

+1.5 dB 140

0 dB 128

0 dB 128

0 dB 128

0 dB 128

5

Edgeport Speaker

-12 dB 0

-12 dB 0

0 dB 128

-3 dB 96

-3 dB 96

-5.2 dB 68

-3.8 dB 84

Table H. Equalizer Presets (Numbers in Red indicate equivalent CV Value)

7

User Customizable

CV 154

CV 155

CV 156

CV 157

CV 158

CV 159

CV 160

Custom EQ Settings Finally, a setting of 7 allows you to customize the EQ response using CVs 154 thru 160, each which controls a different frequency band as follows:

CV 154, 62.5Hz CV 155, 125Hz CV 156, 250Hz CV 157, 500Hz CV 158, 1KHz CV 159, 2Khz CV 160, 4Khz

Tsunami Steam Sound User’s Guide

Page 37

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