Efficient Audio Converter is a powerful and full-featured audio converter software program. It can convert among popular audio formats (MP3, WMA, WAV, M4A, AAC, AC3, AIFF, FLAC, OGG, MP2, and AU), extract music from video files like AVI, MPEG, MP4, or WMV. Besides, it allows you to adjust audio bit rate, audio channel, sample rate and let you select an audio encoder. With this all-in-one audio converter, you can enjoy any music on all popular MP4/MP3 players like iPod, iPod nano, iPod shuffle, Zune, PSP, iPhone, iRiver, Archos, Creative Zen etc.