Your computer already has the basic software to play audio and MIDI files. Additionally, you may be interested in specialized software that adds the abilities to change tempo, transpose, mute tracks for extra challenge and independence, and more. Here are some of our recommendations.
MIDI Software
Home Concert Xtreme provides a unique learning and performing environment that enables students, teachers, hobbyists and professionals to play from a score shown on a computer screen with MIDI accompaniment that intelligently follows the player. A new version for iPad is now available as well.
Sweet MIDI Player has an easy-to-use mixer-like interface.
Synthesia is a free game and piano keyboard trainer that works with any MIDI file.
Audio Software
Amazing Slow Downer provides the means to slow down the audio files, so you can learn the music in real-time by playing it from a CD, MP3, WAV, AIFF, MP4, WMA and many other file formats.