The XR1-E is an analog ring modulator with internal oscillator, preamp and LFO in a nice handmade casing. Offering a wide variety of control options, it may be used to generate sounds from the typical ring modulation and tremolo-like waveforms to glissando and random-like patterns or distortion. The frequency is manually adjustable by knobs for coarse and fine tuning and a switch for high or low (tremolo) range. An envelope follower, a LFO and a Sample+Hold may be used for frequency modulation. The envelope CV can be optionally replaced by an external signal or a voltage from a foot pedal, appliable on a jack on the rear. Further, a minijack 1V/oct input is available for controlling the XR1-E’s frequency by an external CV.