Convolver

Crossfader

Dynamics Compressor

Equalizer

Note: The equalizer should not be used for "enhancing bass" and such. The equalizer's purpose is to correct non-linear frequency response in audio hardware. If you do not understand what that is, please do not use the equalizer.

Gap Killer

Look for periods of silence at the begining and end of tracks and attempts to remove them. Completely unneeded for formats with proper gapless support (LAME MP3, Nero AAC, Ogg Vorbis, lossless) and may actually break gapless decoding for these formats.

Pause Between Tracks

Resampler

Resampler (PPHS)

Skip Silence

SoundTouch

Once SoundTouch is added to the "Active DSPs" list under the "DSP Manager" item in the preferences window this setting takes effect upon playing sounds in the player.

If "Apply slider changes in real-time" is enabled, adjusting sliders while items are playing take immediate effect on the output.