isabido,esto es lo que pone:
http://www.softpedia.com/progChangelog/Equalizer-APO-Changelog-225004.htmlWhat's new in Equalizer APO 0.9 Beta:
August 12th, 2014
· Added: Filter type "IIR", which allows to specify a user-defined IIR filter of arbitrary order with custom coefficients. Improved: For playback devices, the APO is now installed both as GFX (post-mix) and LFX (pre-mix) APO. Normally the filtering happens in GFX, but the command "Stage" allows to select LFX to apply effects based on the number of input channels.
· Added: Expression language. The commands "If", "ElseIf", "Else", "EndIf", "Eval" and inline expressions allow to change the filter behaviour based on runtime conditions.
· Added: Command "Copy", which copies audio data between channels.
· Added: Command "Delay", which delays the audio on the currently selected channels.
· Improved: Configuration files are now locked exclusively for writing while reading them.
· Improved: There is now a transition (10 ms) from old to new configuration after loading.
· Improved: Substantial internal restructuring to improve extensibility and maintainability. Filtering commands now work exactly in the order they were specified.
· Fixed: When the microphone input was in stereo but the application requested a mono stream, the audio was heavily distorted.
· Fixed: The sine sweep generated by the Benchmark application had floating-point precision issues leading to severe artifacts when certain filters were applied.
· Fixed: Configurator requested unneeded reboot on Windows versions before 8.1.
· Fixed: Configurator language was German on French Windows version.
· Fixed: Newer drivers with registry values introduced in Windows 8.1 were treated incorrectly in earlier versions of Windows.
Saludos...............