Townshend Computer Tools DAT-Link - Chapter 9 Using Multiple DAT-Links; 9.1 Synchronization

Chapter 9
Using Multiple DAT-Links
Multiple DAT-Link devices may b e connected to a single computer to provide more
than 2 channels of audio input and output by using dierent SCSI ID's for each
device. Up to 7 DAT-Links can be placed on a single SCSI bus if no other devices are
present. Also, multiple hosts on the same network can have DAT-Links connected.
In b oth cases all of the units can b e accessed from anywhere on the network.
To use multiple DAT-Links on a single host, each DAT-Link should be installed as
described in Section 2.4. The device les created should be called /dev/datlink0 ,
/dev/datlink1 , ::: , with each device le created to corresp ond with a DAT-Link
with a dierent SCSI ID. The NetAudio server, described in the Chapter 3, uses
/dev/datlink0 by default, but this can b e overridden by using the -u option to
set the unit number. For example,
netaudiod -u 1
will start a server which communicates with a single DAT-Link using datlink1
instead of the default, datlink0 .
A NetAudio server must be started as describ ed above for each DAT-Link con-
nected. As describ ed in Section 3.1, this can b e automated by placing commands
in the system startup le.
Client programs specify which DAT-Link to use by either examining the AU-
DIO DEVICE environmentvariable or the setting of the -u option available in each
program. Section 3.2 described these options in more detail.