E)
This audio filter was found in the August 1993 issue of Radio Electronics magazine. It cuts low and high frequencies corresponding to rumble and scratch noises that occur on turntables.
This transistorized receiver was found in Popular Electronics from February 1968. Transistors are...
This sound effect circuit was found in a 1987 publication. It is a circuit that drives a set of...
The circuit shown is from 1997 Linear Technology Applications. The components used were common at the...