Control of the upper frequencies in terms of total response heard by the audience in a cinema, to minimize the effect of unwanted random noise in the system.
"I've used LP2CD a few times now and have always been very happy with the results. This last time magic was performed. A 30+ years old tape of a Live Illusion Concert was submitted and came back with much of the hiss, beeps & bops taken out. Also some distracting hum was eliminated. Holy Smokes, this CD is so very playable now. Thank you, LP2CD, ..."