DSP Plugin
Here you can set up a DSP plugin (they are the same ones that are used in Winamp).

VST Plugin
Here you can set up a 32-bit VST 2 plugin (VST3 and 64 bit do not work). To run the VST plugin it is also necessary to install this component: http://download.microsoft.com/download/5/B/C/5BC5DBB3-652D-4DCE-B14A-475AB85EEF6E/vcredist_x86.exe

Note that usually the DSPs introduce a latency (delay) on the signal, so if you use the TALK button it is advisable to leave this switch on No Plugin to minimize the audio latency.