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Pro Tools 8 Essential Training unveils the inner workings of the industry-standard software for music and post-production. Musician, producer, and educator David Franz demonstrates all the concepts and techniques necessary for recording, editing, mixing, and mastering in Pro Tools 8. He teaches how to create music with virtual instruments and plug-ins, edit with elastic audio for time and pitch manipulation, create a musical score, and mix with effects loops. This course can help any music producer, sound engineer, or hobbyist become proficient in Pro Tools 8. Exercise files accompany the course.
Now, I want to talk to you about Side Chains. Gates and Expanders as well as Compressors and Limiters can be keyed by a Side Chain input. Well, what does that mean? Let me show you an example. Let me open up this Expander Gate and we'll talk about the Side Chain section up here. Routing a signal into the Side Chain input of a Gate allows the Gate to listen to a different audio source and use that Side Chain signal to trigger the Gate to open or close. The signal used to trigger the Gate is called the External Key Input and that's indicated here with this little key button.
Now in this case, I have actually set up a Click track with this Trillium Lane Labs TL Metro plug-in to be our Click track. And I have routed the output to Bus 7. So it stays within Pro Tools and I have this track in the Expander plug-in receive that signal at the Key Input. So Bus 7 is getting the output of this Click track into the Key Input. The Key Input feeds the Side Chain of this Gate.
Now to activate the Key Input, I click this little Side-Chain button. First, let's hear the Synth track without any of the Side Chain action going on yet. (Music playing.) Now I'm going to add in the Click track that is going to be the Key Input and I'm going to make it active here by clicking the Side Chain button and then I'm going to click the Key Listen button, so that we can hear what signal is actually going to be used to trigger the Gate. (Music playing.) So that's the Click track that's going to key the Gate here. Now when I undo the Key Listen button, now we are going to hear the Click track triggering the gate on the Synth track. The Gate is going to open and close to create a pausing 16th Note Rhythm.
(Music playing.) To recap, here is what's happening. The 16th Note Click track output feeds the Key Input for the Gate via this Bus, Bus 7. That goes into Bus 7 here as the Key Input. The Gate on the Synth track takes the click, uses it to open and close the Gate, and then that ultimately creates the Synth path that pauses to the beat of the 16th Note Click track.
So I'm going to play this again and I'm going to switch through a couple of different things. I'm going to play the Synth track with the Side Chain then I'm going to solo the Click track and then I'm going to bypass the Gate, so that we can hear what the normal unaffected Synth tracks sounds like again. So check it out. (Music playing.) That's a pretty cool effect.
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