setSoundVolume (soundFile, newVolume);
Changes the volume of any occurrences of the sampled sound soundFile which are currently playing. The volume of each occurrence is set to newVolume, which should be a number from 0 (silence) to 255 (full).
This function cannot be used to change the volume of track-based music files. For that, use the setMusicVolume function.
No return value.
Using Audio in SLUDGE
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