Each Voice Pack adds an additional 128/64/32 voices* at 48/96/192 kHz to Pro Tools | Ultimate's base 384 voices and will vary according to the track width used—for example:
Mono audio tracks: 128/64/32 additional voices/audio tracks.
Stereo audio tracks: 64/32/16 additional voices/audio tracks.
Quad audio tracks: 32/16/8 additional voices/audio tracks.
5.1 surround audio tracks: 21/10/5 additional voices/audio tracks.
7.1 surround audio tracks: 16/8/4 additional voices/audio tracks.
A mono audio track uses one voice, a stereo track uses two voices, a 5.1 track uses six voices, and so on.
Up to three Voice Packs can be enabled per Pro Tools | Ultimate system for up to 768/384/192 voices at 48/96/192 kHz.
Pro Tools | HDX does not support Pro Tools | Ultimate Voice Packs (increase voice counts by adding HDX cards).
Pro Tools | Ultimate 2019.5 or later.
Pro Tools | HD Native, Core Audio device, or ASIO support.
iLok authorization—you can authorize Pro Tools | Ultimate Voice Packs using either a cloud license with iLok Cloud or with a physical iLok USB key—get one here.
*The total number of voices your system will simultaneously play back is dependent on the processing power of your computer.