A filter designed to attenuate a relatively narrow band of frequencies.
"What a job! I received my original lp and the "rejuvenated " CD today. I was well worth the wait. I can't believe the marvelous job you did in restoring this old LP to a new CD. I never thought, in my wildest dreams, that you could restore and repair this rendering in the manner that you did. I am totally satisfied. At present I don't have ..."