Join Maxim Jago for an in-depth discussion in this video Time stretching, part of Audition CS6: New Features Workshop.
Audition CS6 has some really nice features for adjusting playback speed inside a multi track session. Let's take a quick look at how this works. First of all I have got a really simple session here with 4 bits of audio and if I play this back so you can get a sense of what normal playback speed is (music playing) back to get a bit of the drums here. (music playing) Now you'll notice that at the top right-hand corner of each of these clip segments, there's a little white triangle.
This Volume Option here is a menu, but just down from that I've got a Stretch option, and if I click and drag with that particular triangle, I'm going to adjust the playback speed. Over in the Properties panel, if I collapse Basic Settings and just scroll down a little bit so you can see the Stretch Settings at the bottom. You can see I've now made an adjustment to drop this to 55.6% of the original duration. And you'll also notice that the stretch mode has automatically jumped to real time.
If I select another clip here, you'll see the mode is off. And if I click and toggle the mode back to off again, and this group will go back to its original duration if I want. Now one of the nice things about this stretching feature is you can apply an adjustment to multiple clips at the same time. So if I select all of these I'm just dragging across them with this move tool, I can now click on anyone of these. And you can see I get a little stop watch icon when I'm hovering over this triangle. And I can click and drag and maybe I'll bring this back to about 75%.
And now let's play this again. (music playing) So everything stays insync. Now, notice that the tone didn't change when I adjusted the speed. Audition is automatically compensating for effectively, the reduction in the space between the samples. Which we wouldn't normally produce. A pitch shift. But if I expand out these stretch controls again, and remember I've got all of these clips selected here, you'll notice that okay, I've got a real-time mode, which is what I'm using now.
And this is a reasonably powerful computer, so it should be okay. I'll come to the rendered mode in a moment. We've also got this option of choosing monophonic and polyphonic type. Now essentially this means how hard do you want Audition to try? If you're working with complex audio with multiple voices, then you may find you get a better result when you choose the polyphonic option. To be honest, it doesn't take that long to switch between the two modes. And regardless of the audio type I'd be inclined to try both and have a listen.
You never know until you try it with your actual audio sources. Notice also though, that I have this Vary Speed option. If I choose Vary Speed, see how the semi tones adjust here, under the pitch setting. So I can manually define a duration. If I'm working on a hours, minutes, settings and frames duration I can specify it in time. Here I'm doing bars and beats. Or I can specify a percentage, and here now because I'm in Vary Speed mode. Audition is going to change the pitch.
So if I play this again. (music playing) So, all that's happening here is Audition is removing that compensation for the adjustment to the samples. If I switch this back to polyphonic you can see I'm back to 0 semitones (music playing) The same playback speed, but it's the original tonality. Now as I say, I'm working on a reasonably powerful computer here. And this is playing back absolutely fine. But if you are working on a less powerful machine.
Perhaps you're working on a laptop. You might want to switch to the rendered version. And this is a high quality version. As soon as I do that, you'll notice that, over each of the clips, I'm getting this. Time remaining counter. And I can carry on working and doing other things in my session, I don't have to wait for this to finish applying the effect. But Audition is now doing a very, very careful adjustment to the playback speed, and it's not going to worry about whether it can play back in real time. When it's finished, it's going to create a file which is cashed, it's stored will the other cashed media files associated with the session, and it will just play back like any other piece of media. And you'll notice at the bottom here under the, the Advanced Settings, and you may have these collapsed, so you just click on the disclosure triangle to reveal it.
I've got the option to choose high, medium and low precision. Frankly I can't think of a situation. Where you would want to choose anything other than high quality. If you were, you might as well choose the Real Time mode. And you'll notice also, that we've got different controls for a transient sensitivity and window size. Now, this is a setting that you probably won't need to adjust these two, they're to do with how much of the audio Audition is going to analyze when it's calculating the effect. And also, how sensitive it's going to be to adjustments in tonality adjustments in the samples.
At the moment 40% is absolutely fine if you're working with very complex music with subtle transients between notes. Maybe a string orchestra or something like that. You might want to play with these and see if you can get a better result. There we go. That's done. And let's have another listen. (music playing) So, there you have it, that's working with the new stretch controls in Adobe Audition CS6.
- Importing and managing media files
- Working with sound files
- Multitrack editing
- Time stretching
- The metronome
- CD burning and importing
- Batch process options
- Saving, exporting, and file management