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Tsunami2 Digital Sound Decoder. Diesel Manual - part 12

Advanced Programming

Tsunami2 Diesel User’s Guide

Table L. CV 225: EQ Control Register

*Cut/boost values for CVs 226-232 shown in red

CV Value Description

62Hz

CV 226

125Hz

CV 227

250Hz

CV 228

500Hz

CV 229

1kHz

CV 230

2kHz

CV 231

4kHz

CV 232

Flat

0dB

128

0dB

128

0dB

128

0dB

128

0dB

128

0dB

128

0dB

128

Micro Speaker
(smaller than 1”)

-12dB

+7.12dB

200

+3dB

160

+1.5dB

140

+0.8dB

132

0dB

128

Small Speaker
(1” to 2”)

-6dB

-3dB

+4.1dB

168

+3dB

160

0dB

128

0dB

128

+0.8dB

132

Medium Speaker
(2” to 4”)

-3dB

+4.1dB

168

+2.3dB

148

+1.1dB

136

0dB

128

0dB

128

0dB

128

Large Speaker
(larger than 4”)

+6dB

192

+3dB

160

+1.5dB

140

0dB

128

0dB

128

0dB

128

0dB

128

Custom EQ Levels

+/-12dB

0-255

+/-12dB

0-255

+/-12dB

0-255

+/-12dB

0-255

+/-12dB

0-255

+/-12dB

0-255

+/-12dB

0-255

The graph below indicates the minimum-to-maximum frequency response for each band. Notice
the overlap from one frequency band to the next. Keep in mind that adjusting the response with
one CV will raise or lower the sounds of nearby frequencies as well.

Making adjustments while sounds are playing is the easiest way to set
the EQ because you can listen to each response. Because of this, we
recommend programming this feature on the mainline in Operations
Mode

. Start with CV 226 and make adjustments until you’re satisfied

with each band’s frequency response. Depending upon the speaker
you’re using, adjusting the lowest frequency bands may have little or
no effect. If this is the case, the audio frequencies are out of the
speaker’s range, and we suggest that you set the CV to 0 (-12dB).

Note: Setting the cut/boost levels in CVs 226-232 to values that are
too high may result in poor sound responses or damage the speaker.
Ensure that equalizer settings do not exce

ed your speaker’s power rating to avoid this.

CV Value Cut/Boost

255

+12dB

224

+9dB

192

+6dB

160

+3dB

128

0dB

-3dB

-6dB

-9dB

-12dB

Advanced Programming

Tsunami2 Diesel User’s Guide

Setting Reverb

The reverb effect allows you to add a bit of ‘presence’ to sound effects. CV 233 (Reverb Control
Register) allows you to choose between preset reverb options for sound effects or select user-
adjustable reverb. CV 234 (Reverb Output Level), CV 235 (Reverb Delay Time), and CV 236
(Reverb Feedback Gain Level) are used to set up reverb for the sound effects assigned to CVs
161-192 (Reverb Mixer).

Note: Making big adjustments within reverb control CVs can easily result in unpleasant results.
We recommend you take your time and experiment with small changes first when configuring
this feature.

Reverb Control Register

CV 233 allows you to select reverb presets or user-
adjustable reverb. Setting CV 233 to reverb presets
will automatically adjust CVs 234-236.

User-adjustable reverb works by simulating the effect
created when a sound wave is heard with a delayed
version of the sound that has been reflected off
another hard surface. The decoder’s reverb is
designed to produce an effect due to early sound
reflections off a nearby surface such as a rock cut or
canyon wall. User-adjustable reverb provides three
controls plus a reverb mixer.

Reverb Output Level

CV 234 determines the amount of reverb signal that is mixed back with the original audio signal,
and may be set to a value from 0 (minimum) to 255 (maximum).

Reverb Delay Time

CV 235 determines the overall reverb delay time from 0 to 255 milliseconds. CV 235 may be set
to a value from 0 (zero delay) to 255 (maximum delay). The reverb delay time is calculated as:

Delay Time = CV 235 × 1ms

Longer delay times correspond to a greater distances between the sound source and the
reflecting surfaces and will generally result in increased reverb.

Reverb Feedback Level

CV 236 specifies the percentage of the r

everb’s output that is mixed back into the input and

creates the effect of multiple sound reflections, each diminishing in amplitude over time. CV 236
may be set to a value from 0 to 255 to adjust the amount of feedback from 0% to 100%.

Note: High feedback settings (greater than a value of 200) should be avoided, as they can
result in strange sounding effects. Adjust this CV starting with a low initial value and increase in
small steps.

Reverb Mixer

Adjusting CVs 161-192 allows you to apply the reverb effect to desired sound effects. There are
reverb inputs for each sound effect that control the percentage of the original audio level that will
be mixed into the reverb. Each send level may be set from 0 to 255 to adjust the percentage
from 0% to 100%. CVs 161-192 are listed on the following page.

CV 233: Reverb Control Register

CV Value

Reverb Preset

Disabled

Short Reverb (default)

Medium Reverb

Long Reverb

Short Echo

Long Echo

Extra Long Echo

User-Adjustable

Advanced Programming

Tsunami2 Diesel User’s Guide

CVs 161-192: Reverb Mixer

Sound Effect

Default Value

161

Airhorn

128

162

Bell

163

Prime Mover

164

Air Compressor

165

Dynamic Brake

166

Radiator Fans

167

Alarm Bell

168*

Gas Turbine*

169

Coupler

170

Train Brake Apply/Release

171

Independent Brake Apply

172

Independent Brake Release

173*

GenSet Prime Mover 2

174*

GenSet Prime Mover 3*

175

Poppet Valve

128

176

Steam Generator or Auxiliary HEP Generator

177

Cab Doors

178

Reserved

179

Relay Clicks

180

E-Brake App.

181

Glad Hand Release

182

All Aboard/Coach Doors

183

Reserved

184

Reserved

185

Clickety-Clack

186

Sander Valve

187

Fuel Loading

188

Air Conditioner

189

Wrenches

190

Pneumatic Oilers

191

Toilet Flush

192

Cab Chatter

Default values for these CVs will vary by software release.

Not included in software releases prior to version 1.2.

The steam generator effect is included with all software revisions but the auxiliary HEP generator effect

is not included in software releases prior to version 1.2.

Advanced Programming

Tsunami2 Diesel User’s Guide

How to Adjust Reverb Control CVs

Setting up the reverb involves a bit of trial and error and is best done while the sounds are
playing, using Operations Mode programming to make the adjustments. Start by setting CV 233
to 7 to enable the user-adjustable reverb. Next, set CVs 234-236 to a nominal value. We like to
start with the settings of 64 for CV 234, 255 for CV 235, and 64 for CV 236. Then determine the
sounds you wish to apply reverb to and try setting the corresponding reverb mixer CV (CV 161-
192) to a value between 96 and 192. If you are using multiple reverb inputs, each can be set to
a different value so that more or less reverb is added to a particular sound effect as desired.
With the recommended reverb control settings, you should notice a definite amount of reverb
added to the sound and can begin making further adjustments.

Like any sound effect, it is possible to over-adjust a particular setting within the reverb control
CVs and create an artificial sounding effect. Make adjustments in small steps and let your ears
be the judge!

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