Found on an 80's Radio Electronics, this circuit is designed to pass the 300 to 34,000 Hz voice range using standard operational amplifiers.
This circuit of a few watts of power shows a typical configuration from the 70s using driver and...
Scratch and Rumble are noises that appear when recovering vinyl recordings, both due to scratches on...
This circuit, already explored on this site, can be applied to other comparators in the same...