Audio that is not two-channel, no-surround stereo

I see this error message when I upload my App Preview to the store. Any ideas how to resolve this? Thanks in advance.
One or more of your app previews have audio that is not two-channel, no-surround stereo. For more information, see the Developer Help.

Accepted Reply

Found this in your other 'preview' thread:


>I created an App Preview using iMovie 10.1.12 on MacOS Catalina 10.15 Beta

>length 00:00 / 00:04

>filesize 1.4MB file-format .mp4


Requirements are minimum length of 15 seconds... Just 4 is a problem, I think, and the first one I'd correct.


Confirm your process to add a soundtrack here: Creating App Previews with iMovie


Use iMovie to check the info on that clip and see details on the audio.


Audio specs in your example:


Audio

  • Stereo
  • Codec: 256kbps AAC
  • Sample Rate: 44.1kHz or 48kHz
  • All tracks should be enabled
Stereo configuration:
  • 1 track with 2-channel stereo (1st channel L and 2nd channel R)
  • 2 tracks with 1-channel stereo (1st track L and 2nd track R)

Replies

Found this in your other 'preview' thread:


>I created an App Preview using iMovie 10.1.12 on MacOS Catalina 10.15 Beta

>length 00:00 / 00:04

>filesize 1.4MB file-format .mp4


Requirements are minimum length of 15 seconds... Just 4 is a problem, I think, and the first one I'd correct.


Confirm your process to add a soundtrack here: Creating App Previews with iMovie


Use iMovie to check the info on that clip and see details on the audio.


Audio specs in your example:


Audio

  • Stereo
  • Codec: 256kbps AAC
  • Sample Rate: 44.1kHz or 48kHz
  • All tracks should be enabled
Stereo configuration:
  • 1 track with 2-channel stereo (1st channel L and 2nd channel R)
  • 2 tracks with 1-channel stereo (1st track L and 2nd track R)