Jack Henrie Fisher

Especially but not only within the musical order, the moment of transcription is the dangerous moment, as is the moment of writing, which in a way is already a transcription, the imitation of other signs; reproducing the signs, producing the signs of signs, the copyist is always tempted to add supplementary signs to improve the restitution of the original. The good copyist must resist the temptation of the supplementary sign. He must rather show himself economical in the use of signs.
J Derrida, Of Grammatology, p. 228