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I have a multi-track setup with Adobe Audition and a Motu 828mk3. I currently have three tracks laid down. I want to mix those three tracks down into one track, but I need to constantly adjust the levels of the mix throughout the playback. What I would like is for my existing tracks to act like it's its own input that I could then "record" on the new track.

However, this does not seem possible. Audition only lets me tell a track to record off an actual input, and a track can only send its signal to an actual output. Ideally, I would be able to tell my new track 4 to record its signal based off what's being sent to the master output (or any other output on my 828) from the other 3 tracks. But alas, that can't happen.

What I've tried instead is I got a patch cord and physically connected the Analog 1 output on my 828 to the Analog 1 input of my 828. Now I send the 3 tracks to Analog 1 out and on track 4 I actually record off of the Analog 1 input. This actually works great, but it strikes me as incredibly crude since I figure this should be possible to do without re-routing all the way back out to my Motu box -- I feel like this should be possible exclusively through Adobe Audition itself. Am I missing something?

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So during the playback, you want the volume of one or more tracks to change during a mixdown? –  Kyle Sevenoaks Feb 20 '11 at 22:04
@Kyle, that's right. I want to be able to play with the volume during the mixdown. On this particular song, there's an early section where the voice is too loud. And a later section where it's too quiet. I want to adjust the levels during mixdown to how I like and arrive at a new track with it laid down as so. –  Kirk Woll Feb 20 '11 at 22:16

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up vote 5 down vote accepted

Yes, you are missing Audition's automation functionality. Audition allows you to automate almost many parameters of the incoming audio. This functionality is not unique to Audition, but is common across all modern, commercial multi-track DAWs.

To use automation in go to multi-track screen, choose the channel you want to automate. At the bottom of the channel, where it says "read" you will see a triangle to the left. Click on that triangle and it will expand the automation lane below the track. Pull on the pulldown menu by the word "read" and change the setting to "latch." Then, before adjusting your settings in latch mode, read everything in this section of the Adobe Audition manual. Then after you grasp that, I suggest reading about automating "clips" in the Audition Manual.

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Exactly the answer I was going to provide :) –  Kyle Sevenoaks Feb 21 '11 at 6:10
Thanks, this is exactly what I needed. –  Kirk Woll Feb 26 '11 at 2:45
Well, +1, that answers correcly the user's problem. However, it does not answer the title of the question, which is "How to mixdown in realtime in Adobe Audition". I came here for this exact problem, but with an external effect. –  moala Jun 16 '11 at 12:52
Adobe Audition, like most DAWs, is not really intended to be a real-time playback engine. If you want to do automation on the fly as your tracks are playing back simply purchase one of the midi automation controllers supported by audition and move faders/knobs during plaback to your heart's content. –  phasetransitions Jun 16 '11 at 14:08

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