From the ALSA wiki
This web site is a special type of web site, it is a wiki. That means, that anyone can edit its content. By consequence, it is constantly improved and extended by many different people. The most popular wiki certainly is wikipedia. If you want to know more about wikis and their history, have a look at wikipedias article about wikis. In order to make it freely available for re-use or distribution, everything published on this wiki is licensed under the "Creative Commons" licence.
If anyone can edit this wiki, you can edit it, too! Just click on the edit button on the top of a page and there you go! Old versions are kept in the articles history, so you can't destroy anything ;-) If you want other people to know who made the changes, you can create an account, but you don't need to. To learn more about editing, read the Help:Editing article. If you're not sure about the changes you want to make, you may want to discuss them first. Look at Help:Discussion to learn, how to do it.