The shape of the graph representing the successive values of a varying quantity.
"GALAPAGOS by Pierre Gouin, Montréal. Your transfer of my more than thirty years old Ampex tape is absolutely perfect. I never hoped the sound of the professional recording would be preserved so faithfully. After so many years, I¹m very happy to be able at last to hear my composition and have it heard by other people! And the price is right! ..."