The Electro-Harmonix Blurst is a modulating filter pedal which affords electric guitar players/bassists control parameters more commonly found on modular synthesizers. With this pedal, you can achieve a wide array of strange, esoteric sounds and soundscapes, as well as more common envelope tones, and even timbres similar to that of a phaser.\r\n

In fact, the pedal functions similarly to an envelope filter, but the filter here isn’t controlled by your playing dynamics; instead, an internal oscillator controls the envelope. A low-pass filter with adjustable resonance is provided, as is a volume control, a blend control (to dial in dry signal), rate and range knobs, and a variety of switches to dictate parameters such as note type and LFO shape.\r\n

You can also route an expression pedal into the Blurst, using the EXP MODE switch to change which parameter you modulate in a continuous manner with the connected footswitch. In addition to expression control, the pedal can accept CV messages from compatible controllers. A tap tempo switch is also offered to keep your effects in time with the band or sequenced track.\r\n

The pedal features an all-analog signal path, and utilizes true bypass circuitry to keep your sound pristine and unprocessed when the pedal is disengaged. A power supply is provided to run the unit.