When Symphony I/O is set to Pro Tools audio interface mode, the delay through Symphony’s A/D and D/A have been adjusted to match an Avid HD I/O. This means that when Pro Tools delay compensation makes adjustments to align signal paths, you can be sure that any signals routed through Symphony I/O remain sample accurate.

There are a few details to be aware of when routing signal through a system with a mix of Symphony I/Os and HD I/Os (or other Avid interfaces). Please see the document linked below for a full explanation.

Symphony I:O & PT Delay Compensation