Each category contains a free sound pack zip file with thousands of royalty free sound files. For example, the Guitar zip file will have every type of guitar sound that you would want (flaminco, acoustic, electric, distorted, clean, bass guitars, chords, strummed, picked, fingered, ibanez, les paul, etc). Each zip contains WAV and SF2 (Soundfont) files to be used in all modern music tools such as Reason, FL Studio, etc.