![]() I wanted to be able to change the volume from the operating system (a la alsamixer) or through the MPD client, and still be able change it up or down by physically turning the knob on the device. ![]() 1 The problem here is that this is a very hardware oriented method of setting volume, when what I really wanted to do was set the software volume setting on the Raspberry Pi. A potentiometer is a hardware device with a knob or a slider that, in a word allows for a variable voltage input into a circuit. Traditionally volume control devices are implemented with potentiometers acting as inputs for amplifiers. I wanted to attach a knob to my Raspberry Pi to act as a volume control for my MPD based jukebox.
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