Specifications

Appendix A: DSP Requirements for TDM Plug-ins 101
Maximum instances are approximately half at 88.2 kHz and 96 kHz, and approximately a quarter at
176.4 and 192 kHz. Actual results will likely be less due to system and session variables.
Multi-Mono and Multi-Channel DigiRack Plug-ins
Plug-ins used in multi-mono format on greater-than-stereo tracks require one mono instance per
channel of the multi-channel audio format. A multi-mono EQ used on a 5.1 format track, for exam-
ple, requires six mono instances since there are six audio channels in the 5.1 format. Because multi-
channel versions of the Compressor II, Limiter II, and Expander/Gate II plug-ins are available for use
on greater-than-stereo tracks, separate instance counts are given for those configurations.
Time Adjuster (short) 146 72 117 58
Time Adjuster (medium) 32 16 114 56
Time Adjuster (long) 72363216
Trim 145 n/a 119 n/a
Maximum instances of real-time TDM plug-ins per DSP chip for Pro Tools|HD cards at 44.1 and 48 kHz
Plug-in
HD Accel HD Core and HD Process
mono/stereo mono/stereo
Table 1. Theoretical maximum instances of real-time TDM plug-ins per DSP chip for a Pro Tools HD Core and HD
Process card at 48 kHz**
Plug-in LCR
Quad
&
LCRS
5.0
5.1 &
6.0
6.1 &
7.0
7.1
DSP Chips per
HD Card
DigiRack Pitch
partial partial partial partial partial partial 9
D-Verb
partial partial partial partial partial partial 9
Compressor/Limiter III 3 3 2 2 2 2
9
Expander/Gate III 3 3 2 2 2 2
9
De-Esser III
Mod Delay I (short)
14 11 8 7 6 5 9
Mod Delay I (slap)
1086544 9
Mod Delay I (medium)
543222 9
Mod Delay I (long)
partial partial partial partial partial partial 9
Mod Delay II (short)
14 11 8 7 6 5 9