Can I convert 128kbps to 320kbps?
Don't do it! 128kbps files are much smaller than 320kbps files, and the reason is that they have been “compressed” much more from the original audio.
What bitrate is MP3?
Audio CD bitrate is always 1,411 kilobits per second (Kbps). The MP3 format can range from around 96 to 320Kbps, and streaming services like Spotify range from around 96 to 160Kbps. High bitrates appeal to audiophiles, but they are not always better.