Filters - Hangman/TuningFork GitHub Wiki
Filters provide a simple way to filter out high or low frequencies.
This is what the sound path would look like if both possible filter types were active:
Direct Filters
In this example, the low frequencies are played with a volume of 50%, high frequencies are at 30%.
soundSource.setFilter(0.5f, 0.3f);
Effect Filters
It's also possible to apply a filter to an effect instead of the source directly:
SoundEffect effect = new SoundEffect(EaxReverb.domeSaintPauls());
soundSource.attachEffect(effect, 1f, 0.3f);