Some History on the Development of the Moog Little Phatty

For whatever reason a thread cropped up on AH questioning Bob Moog's involvement with the Little Phatty and specifically whether he was involved at all. One, I remembered the project started when he became ill and two, core bits of the tech is based the Voyager! Even if he wasn't hands on, much of the technology that makes it what it is would still have come from him. I don't get it. That aside the following is an intersting insight to Bob Moog's involvment as well as the involvment of his team.

"Bob was completely involved in the genesis and design of the Little Phatty. He was actively working on the project when he became ill. He wired up the first prototype, which was built from a modified Voyager analog board wired directly to a panel of pots. The original idea was a stripped-down all analog two-oscillator performance synth, with a minimal but effective feature set and a knob per function on the panel. No MIDI, no patch memory.

This concept did not survive any opinion surveys, which all indicated that MIDI and memory were required features. Once we added a digital board to the design, the knob-per-function interface became too expensive to keep cost within our target for an inexpensive two-oscillator performance synth.

So, the final Little Phatty interface was conceived, using a knob per synth section rather than a knob per function. I believe this layout was conceived by Axel Hartmann. The Real Analog Control [RAC] system, where pots are both scanned for digital value and physically switched into the analog circuits which they are controlling, was conceived by Steve Dunnington.

So, Bob Moog brought the Little Phatty project into being, and shaped its original feature set. Most importantly for this project, he select Cyril Lance in particular to be his assistant/successor, after a very discriminating search. Cyril stepped in at the point when the project code-named "el P" was making the transition from all-analog to midi & memory, so he designed the Little Phatty digital board as one of his first projects for Moog Music. Prior to this, of course, Cyril had been a consulting engineer, a particle physicist (graduate of Cornell; same university as Dr. Moog), and of course a touring blues guitarist of some repute. Even though the digital board design was ultimately Cyril's, it was done in close reference to the digital board of the Voyager, which was rather similar to the digital board of a Memorymoog. As for the Little Phatty analogue board, it is comprised almost entirely of circuits taken directly from the Moog Voyager. The're the exact circuits Bob designed well before his untimely passing, simply configured for a different synth concept. The circuit layouts and corresponding component values for a given little subsection are generally identical between the Voyager and LP.
A notable exception is the Little Phatty's Overload circuit, which was designed and painstakingly tweaked by ear by Steve Dunnington. I think he did a good job with that circuit.

So, the LP has Bob's Voyager oscillators and Bob's Voyager envelopes (complete with quirks and circuit errors just like on the Voyager), the same implementation of the ladder filter (only times one instead of two), the same VCA design. An instrument is a whole The digital control, the RAC system, the panel layout, overload... these things were designed by other people, all of whom desired to continue Bob's legacy and to create a real, playable instrument that stood on its own merit. I should mention that the original Little Phatty firmware was written by Chuck Carlson, a programmer who had worked with both Moog and Buchla prior to working on the LP.

I have been the alpha tester for the Little Phatty firmware as it has developed, and I've gotten to make a suggestion or two along the way.

I'm writing this instead of getting sleep here at the NAMM show, so I'd better leave it there.

Hope this helps,
Amos"

Note Axel Hartmann also designed the interface for the Voyager, and a numbe of other synths. Check out this post for the list of synths. You might be surprised. He is the face of many of our modern day knob laden synths.