What is the function of the 1 μF capacitor connected to a potentiometer?

The function of the 1 μF capacitor connected to a potentiometer is to adjust tone, particularly in audio circuits. In the context of audio processing, capacitors are often used in conjunction with potentiometers to create filters that shape the audio signal. When connected with a potentiometer, the capacitor helps to determine the cutoff frequency of the signal that either passes through (in the case of high-pass or low-pass filters) or is attenuated.

By varying the resistance of the potentiometer, the user can change the impedance in the circuit, which affects how much of the audio signal is allowed to pass through the capacitor. This combination allows for adjusting the tonal characteristics of the audio output, such as boosting treble or bass frequencies. Consequently, the correct answer reflects the typical application of a capacitor with a potentiometer in audio circuits, where tonal control is achieved through mutual interaction.