"Although Numan writes all of his music on an aged upright piano, slowly adding effects, synth sounds and big beats, he also works with modern gear: Emagic Logic Audio Platinum and Digidesign Pro Tools on an Apple Mac G4 with two iZ Technology RADAR 24 digital recorders and a Mackie d8b desk. His synths are both soft and hard: Korg Wavestation, Alesis QuadraSynth, Korg M1, Roland D50 LA, GEM S2 Turbo and a Korg electric piano."

Francisco Durán, recognized for his multifaceted roles in the music industry including singer, guitarist, keyboardist, and composer, is confirmed to have used the Alesis QuadraSynth. This identification is substantiated by visual evidence from a live performance video of Los Bunkers promoting their single "Canción De Lejos" on the TV program "Sábado Gigante" by Canal 13, dated May 2003. The source, provided by Almanaque Bunkero, showcases Francisco Durán utilizing the Alesis QuadraSynth, marking it as a significant piece of equipment in his musical endeavors during that period.

Neal Morse uses the Alesis QuadraSynth during Transatlantic's performance of "Into the Blue," employing it for piano and various synth sounds, as seen in the YouTube video.

On Jay's website, he shows a photo of his second synthesizer setup which shows the QuadraSynth.

In this video, Clive is using a Quadrasynth with Pendragon.

At the 1 minute and 20 seconds mark of Pain of Salvation's "Inside" music video, Fredrik Hermansson can be seen using an Alesis QuadraSynth. (Source: YouTube, MetalBlasterX, "pain of salvation inside")

"Sometimes it pays to hang onto things. I just realized that I got this keyboard 20 years ago this year! It's an Alesis Quadrasynth."