This allows for the randomization of selected sounds. This can be used for any effect but is especially important for Transition Sounds here: ProffieOS7.x "Transition Sounds" pre-alpha discussion
The Transition Sound is a selected sound, meaning the style code will select the exact sound file to play. In order to prevent monotony Fredrik has added this new way to randomize sounds.
If I set up a “Lightning” bolt sound, an explosion sound, a fireball sound, etc. for use in transition animations, the style code would select and play that sound by it’s number so say it’s:
tr000.wav for lightning tr001.wav for explosion tr002.wav for fireball
When I want the lightning sound to trigger the style code calls sound “0” (which = 000), for explosion it would call “1” and fireball it would call “002”. Now if I wanted to have multiple sounds for each to get more diversity in the sounds I would set up the tr sounds like so:
<root> tr/ 000/ 000.wav 001.wav 002.wav 003.wav 004.wav 001/ 000.wav 001.wav 002.wav 003.wav 004.wav 002/ 000.wav 001.wav 002.wav 003.wav 004.wav
Then when the 0 sound is called the OS will randomly select from the 000.wav, 001.wav, 002.wav, 003.wav or 004.wav available.
NOTE: all sounds must have the same number of sub files or you will get an error in font directory.
This allows the style to pick the right sound but still have some randomization in what’s played.