Editing Analog synthesizer (section)

{{Short description|Synthesizer that uses analog circuits}}
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[[File:Minimoog.JPG|thumb|right| The [[Minimoog]] is one of the most popular analog synthesizers ever built]]
An '''analog synthesizer''' ({{langx|en-GB|'''analogue synthesiser'''}}) is a [[synthesizer]] that uses [[Analogue electronics|analog circuits]] and [[analog signal]]s to generate sound electronically.

The earliest analog synthesizers in the 1920s and 1930s, such as the [[Trautonium]], were built with a variety of [[vacuum tube|vacuum-tube]] (thermionic valve) and electro-mechanical technologies. After the 1960s, analog synthesizers were built using [[operational amplifier]] (op-amp) [[integrated circuit]]s, and used [[potentiometer]]s (pots, or variable [[resistor]]s) to adjust the sound parameters. Analog synthesizers also use [[low-pass filter]]s and [[high-pass filter]]s to modify the sound. While 1960s-era analog synthesizers such as the [[Moog synthesizer|Moog]] used a number of independent electronic modules connected by [[patch cable]]s, later analog synthesizers such as the [[Minimoog]] integrated them into single units, eliminating patch cords in favour of integrated signal routing systems.