MIDI is a file format used for sound files. It is an abbreviation for Musical Instrument Digital Interface. This industry standard protocol allows various musical instrument to have digital channel with PC. Rather than transmitting analog signal, MIDI protocol converts signals to digital formats. Each detail of sound like pitch, intensity, frequency, etc. is sampled. Hence MIDI provides lossless
. digital audio contents. Free MIDI files can be obtained from internet and media like CD. Make sure that the content is not copyrighted, otherwise you should take permission of creator before using it. Some sites also sell musical content in MIDI format. You should prefer this file format if you wish to have rich sound experience for your studio or home. Recording softwares like Audacity also allow you to save and convert any sound contents to MIDI files. You may buy a MIDI recorder for your Guitar or any musical instrument and capture your creations.