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Summary: Setting the playback engine for a Pro Tools session allocates computer memory to Discover tips on how to use the playback engine in Pro Tools with tips from an experienced music engineer in this free video.
"Now, when doing your project, sometimes the playback engine might not be set right. Like sometimes you might be recording, and it'll say you need to increase your buffer size, different things like that. I'm not really that used of it, just because I have a very powerful computer, but if you're not so lucky, you might need adjust a few things within your system. So, what you do, is, you go into setup, and you go to the playback engine. And once you go to the playback engine, you're going to see different options, as far as increasing your hardware buffer size. Like I have up to 8192 samples, right, I can do things from things like that, as far as the CPU limit, and different things that you can change, in order to make your- make everything a little bit smoother. As far as your playback buffer, and things like that, these can all help you. Another thing, is, with TDM there's a number of voices. Right now I have 96 voices, which means I can use 96 tracks, I believe. What I can also do is change that to a 192 or 144, or even bring it lower. And this basically allows me to use a certain amount of DSP's, it allows me to have a certain number of voices per track, which definitely allows me to use less space or more space, depending on what I'm recording."
eHow Article: Pro Tools Playback Engine Tips