A legal transaction is the only way to achieve free exchange of value  Because the artist made the music, it is their property, in this case “intellectual property”. Property means that the owner/artist has the right to ask something from you in exchange for you gaining access to the music. This may be money. It may also be the requirement that you clearly recognize the artist’s moral right to always be mentioned as the creator of that music. This is called the “free exchange of value”, and this is the most fundamental relationship in our free market economy.  Whatever the artist chooses as payment through a legal transaction, it is his/her basic right to ask this of you. The only way to make sure that he/she can actually exercise that right is by making sure you only take music from the artist through a legal transaction, i.e. with their permission. Only then can we be sure that the desired free exchange of value has taken place