Version 14.2.0.34 on Intel Mac

When a stereo clip is on a stereo track the clip pan envelope sets the balance between the left and right channels. If the clip pan is set to L100 then you will only hear the clip's left channel. If that stereo clip is a 2 channel clip created from 2 channels of a multichannel audio file then the pan envelope will work correctly on playback but will be ignored on mixdown.

To reproduce the bug:

Create a new stereo multitrack session
Open a multichannel audio file, select two channels of that file and drag them onto a stereo track. (Depending on your settings Audition may try to put the two channels onto two different tracks, in which case hold down option as you drag)
You should now have what looks like a stereo clip.
Make sure "View>Show Clip Pan Envelopes" is selected
Drag the Pan Envelope up to L100
When you play the session you'll only hear audio from the left channel
Right-click on the track containing your panned clip and choose Bounce To New Track>Selected Track
The audio on the new track will contain audio on both the left and right channels
Choose File>Export>Multitrack Mixdown>Entire Session
The exported mixdown will contain audio on both the left and right channels

Workarounds are:

Once you've dragged the clip to the Multitrack Session, choose Clip>Convert to Unique Copy. This discards the unused channels and creates a new stereo source file. The problem with this is that if you've already got panning envelopes in place they are lost when you do this.

If you have a long clip with complex pan envelopes already in place which you want to keep, click on the clip to select it, position the playhead just before the end of the clip, choose Clip>Split, drag with the cursor to select the main clip and the small slice at the end, choose Clip>Merge Clips. This effectively bounces the clip in place, correctly applying any envelopes.

Please change behavior of the Solo button so it aligns to the behaviour of all other programs in the world:

• Click -
  Disable Solo on all other tracks and enable Solo only on the selected track. If the current track already was in Solo mode, switch off Solo for all tracks, incl. current track.

• [SHIFT]-Click -
  Enable Solo on the selected track, plus all neighbour tracks while retaining [SHIFT]-Click and hovering the mouse across the track list. If the current track already was in Solo mode, disable Solo for that track, plus all neighbour tracks while retaining [SHIFT]-Click and hovering the mouse across the track list. Leave the Solo state of all other tracks untouched.

• [CTRL]-Click -
  Toggle the Solo state of the selected track. Leave the Solo state of all other tracks untouched.

I'm getting nuts on the current behaviour Solo button misbehaving by not switching playback to the selected track but instead adding that track to an already selected Solo track.

I haven't used audition for multi-channel editing for long but just noticed I've been bit by this on multiple outputs and have to re-export tons of audio from audition, re-encode it into something usable externally since audition doesn't support any useful multi-channel file formats natively, and re-mux several hundred GB of video as a result

I'm mainly using it to overlay Rifftrax commentary onto movie audio, and don't have a surround system yet aside from the pseudo-surround built into the TV (but figured it'd be better to do everything as 5.1 just in case) and was noticing that it sounded "off" in some cases. There was also the mystery of why ffmpeg was producing massively smaller encodes of Audition output than of original lossless tracks...

It turns out that for some godforsaken reason, if I create a 5.1 channel multitrack session and drag a 5.1 channel file onto the first track, the default behavior is that the first track is stereo (why, and where is the indicator of this other than output levels which I presumed to be related to my device outputs?), and assumes that I want the 5.1 channel audio I'm dragging into it downmixed to stereo (why would this EVER be the case on a 5.1 session?)

This default behavior / layout / whatever you want to call it is possibly the silliest thing I've ever seen out of editing software aside from the weird encrypted software HEVC encoder binaries Premiere buries in its install directories then tries to decrypt into C:\Users\Public\Documents\, fails miserably, and a result is useless for actually encoding anything. Nobody seems to know how to fix that one or wants to so I'm going with filing a request to change this silly behavior.

I'm really seeing less and less of a reason to keep anything but the basic photography subscription since everything else I've tried to use in the past year has either been broken in weird ways or has newly been broken (the HEVC thing).

For the automatic pitch correction, I would like to see Harmonic and Melodic minor scales added in/or differentiated between. There doesn't any discernible difference between the minor scale and relative major. So if I am arranging a piece of music or a song in the key of A minor, and when I use the auto pitch correction, the G#s are flattened to Gnat. I am have to use the chromatic followed by individual clip tuning.

When I select the scale, you could Minor - Natural (The same as the relative major, which is pointless). Harmonic Minor (Sharpened 7th) In A minor, the G natural becomes a G#.

Customisable scales, for modal use may also be a nice touch.