Audio Renderer (audio device)
The Audio Renderer is the component used to output audio to your Speakers or Sound System. Each Audio Device (Sound Card) in your system may have two or more Audio Renderer components listed. Under most situations, the Audio Renderer should be set to "Default DirectSound Device" (the audio device set as primary by windows), but if you have multiple audio devices on your system, you can select a specific device from the list.

Under rare conditions (usually with older, less compatible audio devices) you may want to select the "Default WaveOut Device". Only do this if you're experiencing audio glitches. Changing the volume with a WaveOut device selected will change the system volume level (DirectSound devices have no impact on the system volume level).

Audio Device Filter Manager
The Audio Device Filter Manager is a very advanced feature, allowing you to view/modify system values related to your audio devices. There is very little reason to modify values related to audio devices as they are usually handled by the installation procedure used to install your hardware, use with care.

Enable Internal Equalizer / DSP / Visualization filter
When enabled, Zoom Player will make use of its internal Audio DSP component in order to support such functions as Audio Equalizer, PreAmp (digital audio amplification) and Audio stream switching in media files. On very rare conditions the DSP component may cause audio problems and can be disabled here.

Enable Equalizer / PreAmp (requires Internal DSP filter enabled)
This setting controls actives/disables the Zoom Player PreAmp/Equalizer features. It provides the same action as the ON button on the Equalizer interface.

Set Equalizer Range to +/- 20db (default is 12db)
By default, Zoom Player's Equalizer range (volume change on each frequency range) is 12db, by enabling this setting, the range is extended to 20db, allowing for stronger amplification ranges but with lower sensitivity.