Buchla 272e Polyphonic Tuner

The Buchla 272e Polyphonic Tuner is a digital tuning device designed by electronic music pioneer Don Buchla. It is used to tune multiple notes simultaneously, allowing for complex polyphonic tuning. It works by using a combination of digital signal processing and analog circuitry to detect and measure the frequency of each note. The 272e has a variety of features, including a built-in metronome, a tuner display, and a range of tuning modes. It also has a built-in MIDI interface, allowing it to be used with other MIDI-compatible devices. The 272e has been used by a variety of artists, including Aphex Twin, Autechre, and Squarepusher.