Specifications

Appendix B: TDM Mixing and DSP Usage 609
DSP Usage and I/O Allocation
On TDM-equipped Pro Tools systems with a sin-
gle audio interface, at least one DSP chip on
your HD card (Pro Tools HD-series systems),
MIX card (Pro Tools|24 MIX systems) or DSP
Farm (Pro Tools|24) is automatically allocated to
mixing and input and output tasks. See “Mixing
with Sends and Busses” on page 601 for specif-
ics.
Even though this is only a small portion of the
DSP power available on the chip, it effectively
dedicates the entire chip to mixing tasks, mak-
ing it unavailable for plug-ins.
If you have an additional audio interface as-
signed to an HD Accel, HD Process, MIX Farm,
or DSP Farm card, Pro Tools will use a DSP chip
on that card for mixing and I/O tasks as well.
If you are not currently using your additional in-
terface, you can free up DSP and use it for addi-
tional plug-ins.
To reallocate I/O capacity on an HD Accel,
HD Process, MIX Farm, or DSP Farm card:
1 Choose Setups > Playback Engine.
2 From the Card pop-up menu, select the
HD Accel, HD Process, MIX Farm or DSP Farm
whose DSP you want to reallocate.
3 From the Interface pop-up, select No Inter-
face.
4 Click OK to close this dialog.
When the session reopens, the DSP that was al-
located to I/O is available for mixing or plug-ins.