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User Guide 21ProFire 2626
Active Software Returns
ProFire 2626 allows for a maximum of 26 software
returns. The Control Panel software allows you to
reduce the number of software returns in order to
minimize the demands placed on the FireWire bus
and decrease the amount of system resources used
by ProFire 2626. Due to slight differences between
how the Windows and Macintosh platforms handle
audio, this parameter appears differently in the
Control Panel and is described separately below for
each operating system:
Windows: Software returns can be activated/
deactivated in banks. Check a bank to activate its
corresponding software returns or uncheck a box to
deactivate the software returns.
Macintosh: The ProFire 2626 Control Panel for
Mac OS X has a drop-down menu showing the
maximum number of software return channels.
This menu allows software return channels to be
increased/decreased in pairs.
Input Channel Order
This section determines the order of the input ports as they appear in your audio software application. Groups
of ports can be dragged and arranged in a left-to-right order (the left-most item appears first in the software’s
hardware input list while the right-most item appears at the end).
For example, if you would prefer the coaxial S/PDIF ports to appear as the first entries in your audio application’s
list of inputs and outputs, drag the “S/PDIF COAX” icon to the left-most section of the Control Panel.
▶ CAUTION: Do not change the input channel ordering while
your audio application is open. This may result in unexpected
performance from your computer hardware and/or audio
software. Once a change is made to this parameter, you may
need to “refresh” or “update” your audio application’s input
routing page to see the updated ordering. Refer to your audio
application’s documentation to learn more about this.
Why are Software Returns
disabled?
Software returns may automatically become disabled
when using ProFire 2626 at higher sample rates.
Please refer to the “Architecture of ProFire 2626”
section of this User Guide to learn more about this.
Windows Users: Software return channels always
appear in your audio application even if they have
been disabled. However, if your audio application’s
outputs are routed to disabled channels, these
software outputs will not be played out of the
interface’s hardware output ports.
If you have recently changed the sample rate of the
interface and some of the outputs cease to play
back, open the Router tab in the Control Panel and
observe the Output Source Routing section: All
disabled software returns will appear grayed-out and
italicized. Make sure that your audio application’s
outputs are not routed to any of these disabled
software returns.
NOTE: Changing the channel order
in the ProFire 2626 Control Panel
may require you to update the input
routing settings within your audio
application.