An outtake from the Bright Sparks Documentary where ex-ARP engineer (and the creator of the SEM filter) Dennis Colin talks about how the Ladder Filter was the inspiration for his lauded and obscenely rare Hyperphase pedal. Sadly, Dennis passed away just after we filmed him at his home in New Hampshire, but his legacy lives on in the ARP 2500, ARP 2600, Aries 300 and the legendary Oberheim SEM filter. Originally released in December 2015 to critical acclaim and created to compliment the I Monster album of the same name, Bright Sparks documents the human stories of eight musical instrument pioneers, - Robert Moog (Moog), Alan R Pearlman (ARP), Don Buchla, Harry Chamberlin, The Bradley Brothers (Mellotronics), Adrian Wagner (Electronic Dream Plant), Peter Zinovieff (EMS) and Ken Freeman. "An engrossing and fascinating documentary that pays tribute to the modest but amazing innovators who changed the face of electronic music" Vince Clarke https://www.gforcesoftware.com/blog/bright-sparks-the-documentary/ null www.imonstermusic.com