Re: Recent update is turning my Master Audio Channel from Stereo to Mono on older projects

Hey Aaron,

Sorry about the issue. Could you try mstegner's suggestion here (https://adobe.ly/4maI43u) and let me know if it works for you?

Thanks,

Ishan

Please tag me (@) in your replies so that it notifies me and helps me respond promptly.

What happens if you create a new project in Premiere Pro 25 and then go to File > Import and import the old project file rather than just open it? Did it work better?

Importing project files into new project generally works better than just open old project in new versions.

I have this same problem in 2025.  The audio mix in a Nest has is set to mono and I can't create a new track for the master mix.  I't looking like whatever track that was used to generate the audio sets the main mix channel

By @aaronjonellhall