Pro Tools HD Software Capabilities with HDX Hardware Acceleration

Pro Tools HD running with HDX hardware acceleration provides the following capabilities:

Up to 256 channels of I/O depending on your system

Up to a total of 768 voiced 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 resolution, at sample rates up to 192 kHz

Up to 7.1 surround mixing capability

Automatic Delay Compensation (16,348 samples at 48 kHz)

Fixed RAM Disk Cache allocation options

No-latency monitoring

Non-destructive, random-access editing and mix automation

Audio processing with up to 10 inserts per track (any combination of real-time plug-in and hardware inserts), depending on your computer’s capabilities

Up to 10 sends per track

Up to 512 internal mix busses for routing and mixing

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 single 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 audio tracks.