The table below lists the audio playback, recording, and voiceable track limits with Pro Tools HD software with HDX, Pro Tools|HD, HD Native, Core Audio, and ASIO hardware (including Pro Tools with Complete Production Toolkit).
Playback and recording voices refers to the number of unique simultaneous playback and record tracks on your system.
Total voiceable tracks refers to the maximum number of audio tracks that can share the available voices on your system. (Mono tracks take up one voice. Stereo and multichannel tracks take up one voice per channel.)
With HDX hardware accelerated and Pro Tools|HD systems, voice limits are dependent on the session sample rate and the number of DSP chips dedicated to the system’s Playback Engine. Pro Tools HD can open sessions with up to 768 audio tracks, but any audio tracks beyond that system’s voiceable track limit will be automatically set to
Voice Off.