LMMS/lmms — pull request #895 by diizy (2014-06-25 17:50:31+00:00)
Title: basic_filters: optimize RC highpass & bandpass filters

For both RC12 and RC24 filter types: handle lowpass separately, because we can then calculate highpass & bandpass with less operations.
This shouldn't affect the performance of lowpass, but probably will make highpass and bandpass a bit faster.