This allows the sampling capacitor (CIN) to charge to the voltage presented ... including Demystifying Analog Circuits in Professional Audio Applications presented at the 118th Audio Engineering ...

This audio frequency generator is a triggered ... The circuit consumes about 2 mA or less. If the circuit is apllied as a morse code signal generator, replace C1 with a 0.1 μF capacitor.

As mentioned, it has been Tom’s experience that some circuits are sensitive to capacitor ESR. Tom says he’s also found it critical to use low ESR capacitors in the Harris MW-1 transmitter audio board.

Capacitors are often found in active electronic circuits that use oscillating electric signals such as those in radios and audio equipment. They can charge and discharge nearly instantaneously ...