spacialaudio.com is an firebird customer

SAM Broadcaster can support 4 different databases. The databases are used to store song information and provide website interaction. If you have no database knowledge we recommend you try the FireBird database since it is very easy to install and use. [ED, that is my qoute of the day for firebird ;)]
More experienced users should try to use the MySQL, PostgreSQL or MS SQL databases.

Read more on SAM Broadcaster installation manual