Music circa 2050

At some point in the next 50 years, musicians will have to create music from scratch rather than create music based on just digital remnants, or new music will be based only on the surviving remnants, i.e. those that still physically exist in a medium that is still playable, and have stood the test of time in a cultural sense. (For example, Beatles recordings are likely to exist, but might not be part of the landscape of music remnants, as Beethoven recordings currently are not.)