PureAudio is an external player plugin.

It can be used as a replacement for the built-in music player to provide some extra "audiophile" features:

• True gapless playback mode (sample-perfect).
• Normal playback mode with adjustable gap length.
• Easy bitperfect playback over ASIO (with appropiate hardware).
• Customizable ASIO channelmapping that allows you to directly drive the S/PDIF output on for example M-Audio Delta cards without having to route through the monitor mixer.
• Option to synchronize visialization with sound.
• Auto-bitperfect feature for passthrough of DTS (or DD) encoded wav files.
• ReplayGain

Of course it also covers most functionality of MediaPortal's built-in player:

• It supports a wide variety of file formats and sampling rates.
• Can also playback over standard Windows sounddevices (DirectX).
• Visualizations.
• Support for VST plugins.
• Support for Winamp DSP's

This player however does not support:

• Crossfading
• BASS effects

For MediaPortal 1.1.0 and up, the PureAudio plugin is listed as "known extension" and can therefor be installed through the MPEInstaller program that comes with MediaPortal.