MP3HD is a lossless format, which means it delivers a perfect digital copy of the original audio – but it manages to do it more efficiently than WAV or AIFF files, which can be massive…
We’ve been here before. Nearly eight years ago Thomson announced a new, higher quality kind of MP3 called MP3Pro.
Like MP3HD, it was backwards compatible, so your files would play on any MP3-supporting program or device; like MP3HD, it offered better sound quality by combining a high quality and low quality version in the same file. If your device didn’t support MP3Pro you’d get the low quality one; if it did, you’d get the high quality one. It was very clever, and with the exception of MusicMatch Radio, hardly anybody used it.