Used on Discovery, as stated in this May 1, 2001 Remix interview and in this October 1, 2001 Mix Online interview.

Remix

You use vocoders and phase shifters on many of your tracks.

Bangalter: People always ask us what vocoder we use, but every one of our vocal tracks uses a different vocoder effect. We have the old Roland one [an SVC-350], Auto-Tune, and a Digitech Vocalist. We take the same approach with phase shifters. Every track on this album uses a different phase shifter. We have a Mu-Tron phaser, a Moogerfooger pedal, an old AMS phaser, and an Ensoniq DP-4. With the older items, you can have several of the same model and they all sound different.

Mix Online

The key principle that de Homem-Christo repeatedly invokes in discussing Daft Punk's compositional approach is bricolage, a French term referring to the art of taking found materials (in this case, found sounds) and incorporating them into something new. “Sometimes we use an instrument in a way that it was never created for,” he explains. “Some people might say, ‘You're doing something wrong using this effect like that,’ but we always try to do different tricks and techniques that are maybe a little bit wild for usual sound engineers. But by experimenting with some crazy ideas, you find some crazy sounds.”

To get those sounds, the pair uses many vintage keyboards, including Korg, Roland and Moog gear from the '70s. “We use the big ones that were used in the '70s, like the Juno. It depends on how you use it — if you put a distortion effect on a Juno, you can't tell it's a Juno.” Their main synths include a TR-909, TR-808, Juno-106, ARP Odyssey, E-mu 3 and AMS Phasers.

the AMS DM2-20 Tape Phase Simulator is listed in this blog