Diesel Version 5:CV 220
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NMRA CV 220 - Audio Assist Volume
This CV adjusts the volume of the audio prompts in the Audio Assist program. This includes the "Light Mode" and "Sound Mode" announcements, but does not include the Momentum Mode announcement. Note that the Light Mode and Sound Mode announcements, as well as the Momentum Mode announcement can be independently enabled or disabled. See CV #176 - Sound Options #1 for details on how to enable and disable these announcements.
The Audio Assist Volume CV will not allow you to program a value of less than 10% as a safety precaution, so as to prevent accidentally audibly disabling the Audio Assist audio prompts entirely while still being able to use the program. Entering a value less than 10 will set this CV to a value of 10.
All volume CV's are programmed as a percentage, with a value of 100 being 100% and the loudest that the sound of that type can play.