Amadeus II is a very powerful sound editor for Macintosh. In addition to the usual functions you would expect from such a high-quality sound editor (filtering, mixing, creation of echo etc.) Amadeus II has features that distinguish it from other similar products. It supports the Mp3 and Ogg Vorbis codecs that allow you to achieve very low file sizes, while preserving most of the original sound quality. It supports Mp4 and .m4a formats (MacOS 10.4 or later required) and VST Audio plugins. Includes sound repairing functions and analysis tools. It is very easy to create sonograms or to make a detailed spectral analysis of a signal using Amadeus II.