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Audio

For an example, listen to this recording of the author welcoming you to this course.

MIDI

MIDI stands for Musical Instrument Digital Interface. It provides a very efficient way of recording music. Instead of recording the waveform of the sound, which requires a lot of storage, MIDI records the performance information required for your computer’s sound chip to play the music. As you listen to this example, realize that the sound is actually being synthesized by your computer, as codes in the MIDI file tell your sound chip what sounds to make and how loud to make them.

MP3

MP3 stands for MPEG Audio Layer 3. It's an audio file format that uses an MPEG audio codec to encode (compress) and decode (decompress) recorded music. MP3 can compress a CD-audio track into a substantially smaller-sized file requiring significantly less bandwidth to transmit over the Internet without degrading the original sound track's quality.

Editing Audio

Happily, one of the world's best audio tools is freely available for recording and editing audio. Follow this link to check it out: