como puedo subir archivos mp3 sin cambiarlo a wav o otro en adobe premiere pro

At times, you can get away with some mp3 files. True.

But if it doesn't want to work, transcoding is the only fix. Always been a general editing process tool.

mp3 files are at times heavily compressed. Premiere doesn't appreciate most mp3, and especially, the highly compressed ones give it hiccups. So converting to a solid editing format like wav is, for nearly all mp3 files, a wise choice before editing with them.

It's easy to even setup a 'watch folder' in MediaEncoder, so you drag/drop some mp3 files on a 'set' folder, Me then transcodes to your choice, I'd recomment wav ... and stores the exported t-codes in a folder of your choice.

Which can be done overnight, while at lunch or on break, shouldn't take any of your time at all.

And it will then work vastly better in Premiere.