The ARP 2500 is a modular analog synthesizer created by ARP Instruments in the 1970s. It was used by many famous musicians, including Stevie Wonder, Herbie Hancock, and Kraftwerk.
The ARP 2500 is a subtractive synthesizer, meaning it creates sound by filtering out certain frequencies from an audio signal. It has two oscillators, two filters, two envelope generators, and two voltage-controlled amplifiers. It also has a number of modulation sources, including an LFO, a sample-and-hold, and a noise generator. The ARP 2500 also has a built-in spring reverb and a ring modulator.