TS12 Doppler
TS12 Doppler Effects Configuration
Introduction
TS12 introduces Doppler sound effects for diesel (and maybe electric?) locomotives. This is the effect where a vehicle sounding a siren or horn approaches, passes, and recedes from an observer. The received frequency is higher (compared to the emitted frequency) during the approach, it is identical at the instant of passing by, and it is lower during the recession. See wikipedia for more information [1].
Configuration
To implement this effect some additional lines need to be added to the config.txt file of the locomotive sound asset, which has the KIND Enginesound. When searching in Content Manager use Category > Train Engine Sounds to display the sound assets available.
The additional tags required are :
engine-sound-ramp-up-durations soundfile length* [start.wav,up 1 - 2.wav,up 2 - 3.wav,up 3 - 4.wav,up 4 - 5.wav,up 5 - 6.wav,up 6 - 7.wav,up 7 - 8.wav]
engine-sound-ramp-down-durations soundfile length* [stop.wav,down 2 - 1.wav,down 3 - 2.wav,down 4 - 3.wav,down 5 - 4.wav,down 6 - 5.wav,down 7 - 6.wav,down 8 - 7.wav]
- in seconds to 3 decimal places
If there is no start.wav or stop.wav then enter 0 as the first number.
See the wiki entry for KIND Enginesound for more details [2]
Examples
From the built-in TEM2-Enginesound,<kuid2:149682:1000002:1>
engine-sound-ramp-up-durations 14.706,7.086,4.241,4.861,3.017,2.245,2.278,5.119
engine-sound-ramp-down-durations 12.286,7.086,4.241,4.861,3.017,2.245,2.278,5.119
From the built-in BR Class 37 enginesounds v2,<kuid:2512:53374>, which has no start.wav or stop.wav files.
engine-sound-ramp-up-durations 0,1.881,2.293,3.37,1.868,3.555,3.015,2.303
engine-sound-ramp-down-durations 0,1.881,2.293,3.37,1.868,3.555,3.015,2.352
Other
There is also a tag called :
engine-sound-ramp-duration 1
but I don't know what that does!
--stovepipe 12:46, 14 April 2012 (UTC)