A volume indicator the specification of which is given in American Standard ‘Volume Measurements of Electrical Speech and Program waves’.
"As I listen to my CD restorations, phrases like "superb quality" and "meticulous attention to detail" come to mind. Let me explain. I sent twelve LP's to CVC Productions for transfer and restoration, all of which had the pops and cracks that dusty LP's have. One LP in particular, my favorite, was so scratchy that I could no longer listen to it ..."