Changes:

New Effect Lowpass filter (filters all frequencies above specified frequency).
New Effect Dynamic Range Compression
ReplayGain Configuration page redesigned
ReplayGain EBU R128 used by default
ReplayGain EBU R128 defaults to -18 LUFS
ReplayGain New option - iTunes Album Gain
ReplayGain New option - disable clip prevention
ReplayGain New option - identify albums as all tracks in same folder
ReplayGain fix where it would write large RG values for silence.
DirectX Effect added to 64 bit DSPs
Fixed Crash for ReplayGain if conversion was cancelled (in CD Ripper).
Fixed Resample from 192KHz to 88KHz
Bug fix: When applying album again to a very large collection (perhaps quarter of a million tracks), certain albums would be missed

Download:

http://www.dbpoweramp.com/dbpoweramp-dsp.htm