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Tsunami™ Digital Sound Decoder - page 39 / 77





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Sound Programming

CV 128, Master Volume Control

Primary Audio Mixer CVs are as follows: CV 129, Whistle mixer level CV 130, Bell mixer level CV 131, Exhaust mixer level CV 132, Airpump mixer level CV 133, Dynamo mixer level CV 134, Blower mixer level CV 135, Rod clank mixer level CV 136, Steam hiss mixer level

Secondary Mixer CVs: CV 137, Coupler Clank mixer level CV 138, reserved CV 139, Brake squeal mixer level CV 140, Brake release mixer level CV 141, Snifter valve mixer level CV 142, Johnson Bar/Power reverse mixer level CV 143, Pop Valve mixer level CV 144, reserved CV 145, Blower draft mixer level CV 146, Water stop mixer level CV 147, Injector mixer level CV 148, Coal Shoveling mixer level CV 149, Wrenches mixer level CV 150, Oilcan mixer level CV 151, Grease gun mixer level CV 152, reserved

Using the Tsunami Equalizer

Tsunami’s built-in equalizer (or “EQ” as the audio guys like to call it) is much like that you’d on your home stereo system. The equalizer allows you to selectively cut and boost sound levels by +/-12dB over seven selected frequency ranges and provides the “ultimate” tone control.

When most people hear about Tsunami’s equalizer, their first reaction is “Great, now I can really crank up the bass!” What they don’t realize is that the equalizer is also there to cut out the low frequencies as well.

Every speaker has a limit to the lowest frequency it can efficiently reproduce. This is determined by a number of factors and in particular, the speaker’s physical size. To reproduce a low frequency sound at high volume requires the ability to move a lot of air, and hence a large diameter diaphragm.

On the other hand, the electromagnet at the base of the speaker cone will react just fine to even the deepest bass. So if we try to drive a low frequency sound signal thru a small speaker, the speaker still physically reacts to the signal - we just don’t hear it very well because only a small amount of air is

Tsunami Steam Sound User’s Guide

Page 36

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