https://github.com/HopperElec/HopperBot-Java/blob/4ac91ee473b783f1d6d524fa8de98e4e1cefcb91/src/main/java/uk/co/hopperelec/hopperbot/features/PlaylistFeature.java#L95-L201 Audio file duration can be found like this https://stackoverflow.com/a/3009973/
