Beitec Technology Corporation : BTC provides a full range of electronic technology and product development services.

Mu-Tron : The original inventor hosts a site dedicated to the Mu-Tron.

PenguinPix : Penguin pictures, penguin videos, penguin posters and Antarctic landscapes at PenguinPix.

Musitronics : Musitronics product commemorative website with information on the original Mu-Tron.

Inventor's Collection For Sale : The inventors collection for sale! Auction of original prototypes and personal samples by Mike Beigel.

Elliot Randall : His searing guitar solo on Steely Dan's REELIN' IN THE YEARS is just scratching the surface.

DiscoFreq's Review of the BSL : An alternative website with a focus on effect filters. DiscoFreq offers his analysis of the Beigel Sound Lab filter.