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An Avid-qualified Pro Tools system
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ReWire-compatible client software (such as Reason from Propellerheads Software)
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ReWire support is also under development for other third-party companies. For availability, check with the manufacturer or visit the Avid website (www.avid.com).
Track Count with Pro Tools HD
With Pro Tools HD, the ReWire RTAS plug-in can be inserted on any kind of track. Each channel of audio transmitted through ReWire then uses the same amount of resources as the audio track on which it is inserted.
Consequently, you can only use a total combination of audio tracks and ReWire audio streams that does not exceed the maximum number of possible voices for your system. For example, if you are playing 40 audio tracks in a 48 kHz/24-bit session on a 128-voice Pro Tools|HD 2 system, that will leave 88 channels of audio (88 mono, or 44 stereo) available for use with ReWire. (However, ReWire only supports a maximum of 64 audio streams per application.)
Using ReWire at higher sample rates will increase the load on the CPU. For example, CPU load at 96 kHz is double the load at 48 kHz. You can monitor Pro Tools CPU usage in the System Usage window, making sure to not overtax your system.
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Track Count with Pro Tools Host-based Systems
With Pro Tools host-based systems, performance is determined by several factors, including host CPU speed, available memory, and buffer settings. Avid cannot guarantee 64 simultaneous audio channel outputs with ReWire on all computer configurations.
For the latest information on recommended CPUs and system configurations, visit the Avid website (www.avid.com).