Output file duration limit?

I am trying to increase a volume of my mp3 file which is 1 hour 20 minutes long. As soon as i open file in Audacity it shows only around 30 minutes. Is there time duration limit?

Does it play? I’m betting no.

I’m also betting that’s not an MP3.

You can use Media Info to figure out what it really is.

https://mediaarea.net/MediaInfoOnline

You can install FFMpeg software into Audacity so it will recognize and open many different types of sound file.

https://www.audacityteam.org/download/windows/

Koz