master, master copy, original -- (an original creation (i.e., an audio recording) from which copies can be made)
original, archetype, pilot -- (something that serves as a model or a basis for making copies; "this painting is a copy of the original")
Overview of adj original
The adj original has 4 senses
original -- (preceding all others in time or being as first made or performed; "the original inhabitants of the Americas"; "the book still has its original binding"; "restored the house to its original condition"; "the original performance of the opera"; "the original cast"; "retracted his original statement")
original -- ((of e.g. information) not secondhand or by way of something intermediary; "his work is based on only original, not secondary, sources")
original -- (being or productive of something fresh and unusual; or being as first made or thought of; "a truly original approach"; "with original music"; "an original mind")
original -- (not derived or copied or translated from something else; "the play is original; not an adaptation"; "he kept the original copy and gave her only a xerox"; "the translation misses much of the subtlety of the original French")