Specifications
Chapter 5: Pro Tools Systems 45
Audio Recording and Playback Capabilities
The number of simultaneous tracks of audio
recording or playback depends on your system
configuration. A Pro Tools HD system with a sin-
gle HDX card provides recording and playback of
24-bit or 16-bit audio files with the following
voiced track counts:
• Up to 256 tracks at 44.1 kHz or 48 kHz
• Up to 128 tracks at 88.2 kHz or 96 kHz
• Up to 64 tracks at 176.4 kHz or 192 kHz
Each additional HDX card increases the possible
track count by the same amount. For example, at
44.1 kHz, two HDX cards provide up to 512 audio
tracks, and three HDX cards provide up to 768 au-
dio tracks.
Pro Tools HD with
Pro Tools|HD Hardware
Each system requires at least one Avid HD audio
interface (sold separately). Pro Tools|HD systems
can be expanded by adding Pro Tools|HD cards to
increase track count and the amount of plug-in and
mixer processing, and by adding additional audio
interfaces.
Pro Tools HD Software
Capabilities with Pro Tools|HD
Hardware
Pro Tools HD with Pro Tools|HD hardware on
Mac or Windows provides the following capabili-
ties:
• Up to 160 channels of I/O depending on your
system, and the number and type of installed au-
dio interfaces
• Up to a total of 192 voiced audio tracks (up to
768 voiceable audio tracks)
• Up to 512 Auxiliary Input tracks
• Up to 64 Master Fader tracks
• Up to 128 VCA Master tracks
• Up to 512 MIDI tracks
• Up to 128 Instrument tracks
• Up to 64 video tracks per session
• 16-bit, 24-bit, or 32-bit floating point audio res-
olution, at sample rates up to 192 kHz
• Non-destructive, random-access editing and mix
automation
• Up to 7.1 surround mixing capability
• Automatic Delay Compensation (up to 4,095
samples at 48 kHz)
• Fixed RAM Disk Cache allocation options
• No-latency monitoring
• Audio processing with up to 10 inserts per track
(in any combination of real-time plug-in and
hardware inserts), depending on your com-
puter’s capabilities, and the number and type of
installed audio interfaces
• Up to 10 sends per track
• Up to 256 internal mix busses for routing and
mixing