Fix: Audio Not Two-Channel Stereo

What this error means

Apple requires all App Store preview videos to have AAC stereo (2-channel) audio at a 48 kHz sample rate. If your video's audio track doesn't match these exact requirements, App Store Connect will reject the upload with this error. Even if the video looks perfect, a single audio mismatch is enough to block your submission.

Why it happens

• Mono recording — your screen recording captured audio from a single microphone, producing a 1-channel track instead of stereo
• Surround sound — the recording includes 5.1 or 7.1 surround audio channels, which Apple doesn't accept for preview videos
• Missing audio track — the video has no audio stream at all, which App Store Connect treats as a spec violation
• Wrong sample rate — the audio is at 44.1 kHz (CD quality) instead of the required 48 kHz

The manual fix

You can fix the audio channel layout using FFmpeg from the command line:

ffmpeg -i input.mp4 -c:v copy -c:a aac -b:a 256k -ac 2 -ar 48000 output.mp4

This works, but you also need to verify the video codec, resolution, frame rate, and duration all match Apple's specs — one wrong parameter and App Store Connect rejects the upload.

The easy fix

Related errors

• Fix: Unsupported or Corrupted Audio
• Fix: Wrong Video Size or Resolution
• Fix: Wrong Frame Rate