AUDIO_CARD Table Layout for Rivendell

The AUDIO_PORTS table holds data concerning configuration of the 
physical audio interfaces.

FIELD NAME           TYPE              REMARKS
---------------------------------------------------------------
ID                   int(10) unsigned  Primary key, auto increment
STATION_NAME	     varchar(64)
CARD_NUMBER	     int(11) signed
DRIVER               int(11) signed
NAME                 varchar(64)
INPUTS               int(11) signed
OUTPUTS              int(11) signed
CLOCK_SOURCE         int(11) signed    0 = Internal, 1 = AES/EBU, 
                                       2 = SP/DIFF, 3 = Word Clock