Foobar 2000 is an advanced media player that offers a lot of functionality usually not found in other players, for that same reason it's a very popular choice among PC audio enthusiasts. Unlike your standard media player, Foobar is not the easiest program to learn, once you understand it however, it's probably the best player you can use quality-wise.
TechSpot's guide will take you through all available options in Foobar, which should ease the way for those of you wanting to give it a try. It also gives a detailed explanation on the more advanced options and recommendations after using several different consumer-level PC soundcards.
View: A complete guide to Foobar 2000 @ TechSpot