Buchla 297 Infinite Phase Shifter

The Buchla 297 Infinite Phase Shifter is a voltage-controlled analog phase shifter module designed by Don Buchla in the 1970s. It is a classic piece of vintage analog gear that has been used by many famous musicians, including Brian Eno, Aphex Twin, and Nine Inch Nails.

The Buchla 297 works by using a voltage-controlled oscillator (VCO) to modulate the phase of an incoming signal. This creates a sweeping effect that can be used to create a wide range of sounds, from subtle chorus-like effects to more extreme flanging and phasing. The module also features a voltage-controlled filter, which can be used to further shape the sound. Additionally, the module has a built-in envelope generator, which can be used to create rhythmic patterns.