Mu-Tron effects pedals Musitronics, more commonly known as Mu-Tron, was a manufacturer of electronic musical effects active in the 1970s. Their product line focused on filtering and processing effects derived from synthesizer components. Among their most well-known products were the Mu-Tron III envelope filter and the Bi-phase.

The Musitronics Corporation of Rosemont, New Jersey, was formed in 1972 in an attempt to salvage an aborted synthesizer project. Founder Mike Beigel had initially been tapped to design a synthesizer for Guild Guitars. After Guild President Alfred Dronge was killed in a plane crash in 1970, the company made the decision to shut down their electronic division to focus strictly on guitars, abruptly pulling the plug on Beigel’s synthesizer. Subsequently, Beigel teamed up with Guild’s former chief engineer, Aaron Newman, to form Musitronics. They decided to extract sections from the synthesizer and see if they could make a new stand-alone audio effect out of it. The result was first called the Auto Wah, and then marketed as the Mu-Tron III. Synthesizer inventor Bob Moog's affidavit helped get the patent. The Mu-Tron III became quite popular thanks in part to Stevie Wonder's use and endorsement of the pedal.

The company offered traditional effects such as simple phase shifters, flangers, and foot-operated wah pedals as well.

Between 1976 and 1981, six pedals were sold under the Dan Armstrong name, even though they were manufactured by Mu-Tron.

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Effects Pedals
C-100 Opti-Pot Control Pedal
C-200 Volume-Wah
Micro V
Mu-Tron III Envelope Filter
Octave Divider
Phasor II

Dan Armstrong
Blue Clipper
Green Ringer
Orange Squeezer
Purple Peaker
Red Ranger
Yellow Thumper