Mp3 Tempo Changer is a player & converter, which can change tempo and pitch respectively, speed up or slow down of mp3 mp2 mp1 ogg wma ape flac wav midi files. Key features: Speed up music. Slow down music. Change tempo without changing pitch. Change pitch. Playing and changing. Repeat play a segment. Save music files as mp3. Batch operations. Copy mp3 tags while save input file as mp3. Drag and drop. Supported input file types: mp3 mp2 mp1 ogg wma ape flac wav wv midi aac m4a aiff.