Tsunami2 Digital Sound Decoder. Diesel Manual - part 9

Basic Programming

Tsunami2 Diesel User’s Guide

When true-idle is enabled using bit 3 in CV 112, the
auto-notching rate will subtract one notch from its normal
setting. If you have this feature enabled, are operating in
128 speed step mode and have set the auto-notch rate
to 2, the prime mover will not increase the RPM notch
from idle when the throttle is advanced from speed step
0 to speed step 1. It will increase the RPM notch up to
notch 2 when you advance the throttle from speed step 1 to speed step 2.

Technical Tip: If you have the auto-notch rate set to 1, we recommend that you enable the
true-idle feature by turning on bit 3 in CV 112 (Sound Configuration 1). Doing so will ensure that
the prime mover sound effect increases and decreases RPM notches each time the throttle
speed step is changed.

CV 114: Enable Manual Notching

Set the auto-notching sensitivity level to 0 to enable manual notching and disable auto-notching.
When manual notching is enabled, the engine RPM notch level will not be automatically
adjusted in response to the throttle setting, and you must use the RPM+ and RPM- functions to
adjust the engine RPM notch level during operation. Manual notching is intended for simulating
the prototypical operation of a diesel locomotive and allows you to change the engine RPM
notch level when most appropriate. Manual notching is disabled by default.

CV 114: Enable Engine Interlock

Add a value of 16 to CV 114 to enable engine interlock. When engine interlock is enabled, you
must turn on the RPM+ function to start the prime mover before setting the locomotive into
motion. Similarly, you will be unable to turn off the prime mover during movement. In other
words, the locomotive must be stopped before you start or shut down the prime mover. Engine
interlock is disabled by default.

CV 114: Enable Auto-Start

Add a value of 32 to CV 114 to allow the prime mover to start when the decoder receives track
power. For DCC operation, the prime mover will not start when the decoder receives track
power when auto-start is disabled. For analog mode (DC) operation, the prime mover will start
when the decoder receives track power regardless of CV 114. Auto-start is enabled by default.

CV 114: Select Dynamic Braking Modes

Selecting a dynamic braking mode will allow the decoder to set the engine RPM to a designated
notch level when you turn on the dynamic brake function (F4 by default). Dynamic braking
modes are disabled by default.

 Add a value of 64 to CV 114 to allow the decoder to set engine RPM to notch 1 (idle)

when you turn on the dynamic brake function.

 Add a value of 128 to CV 114 to allow the decoder to set engine RPM to notch 4 when

you turn on the dynamic brake function.

 Add a value of 192 to CV 114 to allow the decoder to set engine RPM to notch 8 when

you turn on the dynamic brake function.

Note: The dynamic brake RPM level will override the Dynamic Digital Exhaust RPM setting
when a dynamic braking mode is enabled in CV 114. The HEP mode function and emergency
stop button will override the RPM setting of the dynamic braking mode when the dynamic brake
function is turned on.

Auto-Notching Sensitivity

CV 114 + 0 = Auto-notching disabled
CV 114 + 1 = 1 speed step
CV 114 + 2 = 2 speed steps

↓

CV 114 + 15 = 15 speed steps

Basic Programming

Tsunami2 Diesel User’s Guide

Adjusting Volume Levels

Volume control CVs allow you to set the master volume level for all sound effects, set the
volume level of each sound effect, and enable quiet mode. Values from 0 to 255 may be
programmed into any of the volume mixer CVs (Master Volume, Primary Mixer or Alternate
Mixer) to set the volume level from 0% to 100%.

Adjust the Master Volume Level

CV 128 (Master Volume) is used to adjust the volume level of all enabled sound effects, i.e., all
mixer channels. Values from 0 to 255 may be programmed into CV 128 to set the volume level
from 0% to 100%.

Adjust Primary Mixer Volume Levels

CVs 129-160 (Primary Mixer Volume Levels) are used for setting the volume level of each
sound effect, similar to a modern sound studio mixing board. Like CV 128 (Master Volume),
values from 0 to 255 may be programmed into mixer channel CVs to adjust volume levels.

For the best sound quality, optimize the volume levels by first determining the sound effect that
should be the loudest. The airhorn, for instance, usually creates the loudest sound. Then, adjust
the volume levels of the remaining of the sound effects relative to the airhorn. When you have
all the sound effects to their respective volume levels, adjust the overall volume level with CV
128 as needed.

Adjusting volume levels calls for a certain level of prudence to avoid

“clipping” or “limiting,”

which occurs when the sum of two or more signals exceeds the capacity of the output channel.
Clipping is the clicking or popping sounds you may have heard through a pair of broken
headphones or speakers. To avoid clipping, consider the sounds you play at the same time and
make sure their volume levels aren’t set too high. For example, the airhorn should be as loud as
possible without causing clipping. If you start to hear some distortion, lower the volume level
accordingly.

Note: Be sure that your speaker is rated to match the audio amplifier of your decoder. Ratings
for each format are available on the packaging and at www.soundtraxx.com. Failure to do so
could cause severe damage to your speaker.

Refer to Table H on the next page to view default values for CVs 128-160.

Basic Programming

Tsunami2 Diesel User’s Guide

Table H. Primary Mixer Volume Levels

Sound Effect

Default Value

129

Airhorn

225

130

Bell

131

Prime Mover

150

132

Air Compressor

100

133

Dynamic Brake

125

134

Radiator Fans

135

Alarm Bell

136*

Gas Turbine*

200

137

Coupler

128

138

Train Brake Apply/Release

128

139

Independent Brake Apply

100

140

Independent Brake Release

141*

GenSet Prime Mover 2

170

142*

GenSet Prime Mover 3*

200

143

Poppet Valve

128

144

Steam Generator or Auxiliary HEP Generator

200

145

Cab Doors

128

146

Reserved

147

Relay Clicks

128

148

E-Brake App.

149

Glad Hand Release

150

All Aboard/Coach Doors

192

151

Reserved

152

Reserved

153

Clickety-Clack

150

154

Sander Valve

155

Fuel Loading

156

Air Conditioner

157

Wrenches

158

Pneumatic Oilers

159

Toilet Flush

160

Cab Chatter

Not included in software releases prior to version 1.2.

Default values for these CVs will vary by software release.

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. CV 144 default values will vary by software
release.

Basic Programming

Tsunami2 Diesel User’s Guide

Adjust Alternate Mixer Volume Levels

Tsunami2 includes an alternate volume mixer that can be selected in place of the primary
volume mixer. This allows you to set two volume levels for each sound effect. This can be useful
if you need quieter or louder volume settings for different operating situations, such as one
group of settings for your home layout and another for your club layout.

CVs 2.289-2.320 are used to set the alternate volume levels of each sound effect. Turning on
the alternate mixer function will set sound effect volumes to alternate mixer channel volume
levels in place of the primary mixer channel volume levels in CVs 129-160. The default values
for alternate mixer sound effects are set to half of the primary mixer default values. Follow the
steps below to enable the alternate mixer in place of the primary mixer:

1. Ensure CV 31 (CV Index 1) is set to a value of 16.

2. Enter a value of 1 into CV 32 (CV Index 2) to select Indexed CV Page 1 as the active

indexed CV page.

3. Enter a value of 28 into CV 284 to map the alternate mixer function to function key F28

(You can use any function key, but for the purpose of this example, F28 is an unmapped
key by default).

4. Turn on the alternate mixer function with F28 to enable the alternate mixer volume levels

in CVs 2.289-2.320 in place of the primary mixer volume levels in CVs 129-160.

5. To adjust the alternate volume level of each sound effect, enter a value of 2 into CV 32

to select Indexed CV Page 2 as the active indexed CV page.

6. Adjust CVs 289-320 to set each sound effect to your preferred volume level. By default,

the sound values for the Alternate Mixer are set to 50% of the Primary Mixer Volume
levels.

7. Turn off the alternate mixer function with F28 to re-enable the primary mixer volume

levels in CVs 129-160.

Note: To access Indexed CV Page 1 and Indexed CV Page 2 with CVs 257-512, CV 31 (CV
Index 1) must be set to a value of 16 (default) and CV 32 (CV Index 2) must be set to a value of
1 or 2.

Refer to Table I on the next page to view default values for CVs 2.289-320.

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