ALSA project - the C library reference
The Advanced Linux Sound Architecture (ALSA) comes with a kernel API and a library API. This document describes the library API and how it interfaces with the kernel API.
This documentation is free; you can redistribute it without any restrictions. Modifications or derived work must retain the copyright and list all authors.
This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
Application programmers should use the library API rather than the kernel API. The library offers 100% of the functionality of the kernel API, but adds major improvements in usability, making the application code simpler and better looking. In addition, future fixes or compatibility code may be placed in the library code instead of the kernel driver.