When speaking of free music always many doubts arise. Many people believe that free music is synonymous with free music, and nothing further from reality than that. Free music can be free or not, as decided by the author of the work. If it’s quality music, created by professionals, it is rare to be free: the Professional is profesiobnal because he lives of this and can offer a quality that an amateur musician cannot offer in principle. It is music created especially for professional use, which gives some rights of exploitation to the purchaser on the use in different modalities of these musical pieces. If you want to use non-free music legally for any professional or personal project, must put in contact with the management body of copyright to which he belongs that work to pay the corresponding amount in each case. There is where the sector audiovisual, advertising and internet companies are buying royalty-free music, not having to make advantage payments (if the license has no time limit) after having acquired its license.