WTF! couldnt sleep, read this, tried it and screamed so loud the neighbors from the next building called the police from the high pitch screaming!!!!!!!!!!!!!!!!!
but what bout individual tracks though
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Focus more on your sloppy performance before you blame the equipment!
Play speed only works globally (on the master track).
For an induvidual track, you'd have to use the plugin, and automate it (it works very well, btw).