How do i conver my audio mp3 to mp4 ??
Import the MP3 file and export to AAC/MP4.
If you have a lot of them you may want to write an Audacity Macro to work on the files in a batch processing mode.
For MP3 (aka M4A or AAC) you’ll need to install FFmpeg (if you haven’t done so already). If you are on Windows, jJust download & run FFmpeg_5.0.0_for_Audacity_on_Windows_x86_64.exe.
Or if you just want to convert with no editing Kabuu Audio Converter or TAudioConverter are easier to use… Once you’ve set-up your output format and output folder, it’s just drag, drop, and click, and you can drag-in and convert a batch of files at once.