From Hydrogenaudio Knowledgebase
Adds ASIO output support. Useful for rare/obscure soundcards that provide ASIO drivers but no regular Windows audio drivers, as well as for bit-exact output on any soundcards that provide ASIO drivers.
 Installation and Usage
- Install the ASIO component from the foobar2000 official components site.
- Set your output device to one of your ASIO devices. If you do not see any ASIO devices on the list after installing the component, your sound card does not support ASIO.