1AV MP3 Converter is an all-to-all sound file converter that converts MP3 sound files and other format sound files to any sound file format. Formats supported are aac, ac3, aifc, aiff, aif, amr, au, caf, cda, flac, m4a, m4r, mp3, ogg, opus, raw, spx, wav and wma.The program lets the user convert mp3 to m4a, wma to mp3, mp3 to aiff, wav to flac, m4r to ogg, mp3 to wma, and all other possible combinations.The program is very easy to use, there is practically no learning curve. It is one dialog in which the user adds the files to be converted, selects the output audio file format, tunes the output, and converts the files. It is very simple to operate. The program comes with last memory so no need to re-configure anything. It starts where you stopped it.The user can tune the parameters of each output format. Each extension has its conversion parameters so that the user can have full control and end up getting what he or she needs from the conversions.Small and efficient would be a good way to describe this valuable tool in a few words.