However, on HDX systems, which have DSP processing, voices are also used by other operations because they are audio streams in and out of the Pro Tools mixer. HD Native, HDX & Voice CountĪcross all versions of Pro Tools, the maximum number of ‘voiceable tracks’ is 768: this is the maximum number of audio tracks that can share the available voices on your system. For example, when using Punch Recording, two voices are needed for every single audio channel: one for playback, and one for recording on punch-in and -out. But because voices are audio streams, there are situations where more than one voice per channel is required. So mono tracks will use one voice, stereo tracks two voices, 5.1 tracks six voices, and so on. Typically, each audio channel for each track in your Pro Tools session uses a single voice. I had to manually allocate the voices across the tracks so that the correct four would play when required. So, in my four-voice Pro Tools 442 system, I could have eight mono tracks in a session (stereo tracks weren’t yet available), but only four of them would play at any one point in time. In essence, voices are unique, discrete audio streams that can be routed to and from Pro Tools audio tracks and the physical audio outputs and inputs on your audio interfaces.Įarly Pro Tools systems were typically limited to four, eight or 16 voices you could have more tracks than voices, but the voice count represented the maximum number of tracks that would play sound at any one time. In more recent versions of Pro Tools they have been hidden from us more and more, so it is easy to get track count and voice count confused. In Pro Tools, voices are different to tracks. It seems there is a significant amount of confusion on this topic, so this month, I am going to try to explain what each of these things are and how they relate to each other, what impact they have on the ways in which we can use Pro Tools, and how they differ in typical Pro Tools systems. I get asked a lot of questions about voice, track and I/O counts in Pro Tools. Since Pro Tools 11, however, each HDX card has 64 extra ‘hidden’ voices used for mixer routing that don’t show up here.įrustrated by I/O limitations in Pro Tools? Here’s how it all works. Voices are among the system resources that you can keep tabs on in the System Usage window.
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