, mp3PRO is a proprietary audio codec that combines the standard MP3 format with Spectral Band Replication (SBR)

Using a licensed historical decoder like the legacy dBpoweramp mp3PRO codec , you can decode the file to a lossless WAV format with the high frequencies intact. From there, compress the WAV file into a modern, universally supported format like standard MP3 (at 320 kbps), AAC, or FLAC. The Evolution of the Tech