Per the official Mutronics website, Daft Punk are listed as Mutator customers. Good of Mutronics to keep the page alive despite the Mutator being discontinued in 2007.

Jonny used this on the guitar solo in Paranoid Android in the studio. The Mutator is a stereo analogue filter and envelope follower with full control facilities. It contains two independent voltage controlled filters similar to those found in analogue synthesizers, which can be used to treat any external sound source. Each filter can be controlled from its own associated low frequency oscillator (LFO) and/or its own envelope follower section, which extracts the envelope contour of an input signal and applies it to control the cut-off frequency of the filter.

Each envelope follower can be switched to track either the envelope of the sound that is being treated by the filter, or that of an independent external control signal. This external control signal can be any audio source , eg. a drum sound, a guitar, a synth, a sampler output, or even a microphone. Thus the envelope characteristics of one sound can be superimposed onto the filtering contour of another.

Another switch on the envelope follower selects envelope follow mode or gate mode - in which the circuit detects whether a signal is above a certain threshold level before switching on.

In gate mode, the device can operate much like a dedicated noise gate unit, with the added capabilities of the analogue filter

The LFO's have four different sweep waveforms each and may be switched via a stereo link to produce stereo panning effects.

At the bottom of the article you can see the Mutator in the list of gear he used on Foley Room.

"As you would expect, the studio contains some of the finest processors in the world, including an SPL Transient Designer, two Empirical Labs Distressors, an Audio & Design F760XRS compressor/limiter/expander, a Focusrite Platinum Compounder, a Drawmer LX20 dual expander/compressor and two DS201 dual gates, Fairman and Smart Research C2 compressors, a Mutronics Mutator filter bank, an Electrix Filter Factory, a Teletronix LA2A compressor, a Massenburg Model 8000 EQ, a Tubetech LCA2B compressor, a Drawmer 1960 valve compressor/preamp, a Focusrite Red 7 mic preamp/dynamics processor, and a Joemeek stereo compressor."

"I've got a Mutronics Mutator here as well, so if I do wanna go for some weird filtering then I'll send it back out of the box, into that, and back in again. My vocal chain is the 1084 and Tube Tech CL 1B compressor; that's a winning combo for me."

Daniel Miller is listed as using the Mutronics Mutator in his studio setup, as noted in Sound On Sound.

In the video at 7:22, you can clearly see it in the rack.

It can be seen in the eleventh photo, captioned "Some of Marius de Vries' outboard gear. From top: Digitech Vocalist II effects, Yamaha SPX900 multi‑effects, Alesis Quadraverb GT and Quadraverb multi‑effects, Mutronics Mutator compressor, Avalon input channel, Yamaha REV7 multi‑effects, Alesis 3630 compressor and Tascam DA30 DAT recorder."

"@skudge_elias_landberg Racking #outboard #hardware #gear #mutronicsmutator #klarkteknik #reverb #h3000b #eventide #lexicon #bossce300 #chorus #boss"

The Mutronics Mutator Is Used And Disscussed Through-Out The Video

A Yamaha SPX 900 unit can be seen in Stephen Street's studio, in the fifth photo. The fifth photo is captioned: A selection of Street's gear: from top, TL Audio Classic dual valve EQ and Indigo VP2051 voice processor, Empirical Labs Distressor compressor, Emu Vintage Keys and Proteus FX synth modules, Yamaha SPX900 multi‑effects, Antares ATR1 Auto‑Tune intonation processor, Novation BassStation Rack, Zoom Studio 1201 effects, Mutronics Mutator filter bank, Ensoniq DP2 effects, SPL Transient Designer dynamics processor, and two more Distressors.

can be seen in this post from April 9, 2016