Arca

In an interview with Fader, Arca gives a live presentation to the interviewee of how she produces music. This is her experience: "One afternoon, in something of a music journalist’s dream, she boots up her computer with the intention of giving me a live demonstration of her composition process. Using another program, called iZotope Iris, she takes the sound of a lawnmower, cuts a random geometric shape out of a graph of its composite frequencies, outputs a new sound that sounds like a choir of cooing lemmings.

Arca can be seen working in Ableton in this picture.

Since its release in 2009, Circle has become a popular soft-synth among big label producers like Hudson Mohawke, Arca, David Guetta and Deadmau5.

In a video posted on Instagram, Arca is seen using the iZotope Nectar 3 plugin, highlighting its role in her vocal processing setup.

At the bottom left next to the Ableton screen, you can clearly see her using the infamous Sony MDR-7506 while tracking vocals. She frequently uses the 7506 model in her Twitch streams.

Arca can be seen working in Ableton Live 9 in this picture.

Photo from a instagram story. Arca's hand (screm nail art) can be seen.

In this instagram video Arca posted you can see L2 Ultramaximizer being used as a Ableton plugin

In an Instagram video, Arca is seen playing the Korg KRONOS 88 Key Music Workstation Limited Edition, Gold [Model 2017], showcasing her use of this synthesizer.

In an article by Soundonsound, Arca is mentioned using the Apogee Quartet Audio Interface during the production of Björk’s "Vulnicura." Additionally, the interface was seen in Arca's temporary Instagram story.

In this video of arca preforming there's a clear shot of a DJM 900 Nexus, where all the specific points of a 900 nexus can be seen.

Recognizable and unique side of Genelec 8040A speaker design appears in this video taken by Arca in his studio previewing an upcoming track from his new album, Reverie.

In this image from an instagram post you can clearly see a Neumann U 87 Ai Set Large-diaphragm Condenser Microphone - Nickel as the mic setup.

In an Instagram photo, Arca is wearing the Audio-Technica ATH-MSR7 Studio Headphones.

In an Imgur album titled "arca using minimoog V," Arca is shown utilizing the Arturia Minimoog Mini V Software Synthesizer.

Mackie can be seen at the back

In a photo from the DJ set at Razzmatazz on February 21, 2020, Arca is seen using a Korg microKORG S synthesizer.

One can see Arca playing a lead on the Pro 2 at a show in this Tik Tok

Arca can be seen using the Arturia Pigments 3 VST at 0:04 in this Youtube video.

Arca can be seen using the Limited Edition Korg KRONOS 2 Titanium workstation at 0:19 in this Youtube video.

At the 1:14 mark in this Youtube video, Arca can be seen adding the Waves Doubler plugin to a channel's effect rack in Ableton.

Arca can be seen playing the Arturia MatrixBrute Analog Synthesizer at 0:04 in this Youtube video.

The Clouds Module can be seen next to Arca at 0:01 in this Youtube video.

Can be clearly seen in front of Arca in this Instagram post.

In Arca's Instagram story, Massive X can clearly be seen as a channel instrument while she is showing a snippet in Ableton. It can be seen at 5:17 in this Youtube video.

In Arca's Instagram story, Omnisphere can clearly be seen as a channel instrument while she is showing a snippet in Ableton. It can be seen at 5:11 in this Youtube video.

Arca can be seen using the Waves OneKnob Driver plugin at 9:05 in this Youtube video. The other Waves OneKnob VSTs can also be seen in Arca's audio effect library right below.

Arca can be seen using Vanguard at 19:24 in this Youtube video.

At 19:33 in this Youtube video, Arca can be seen using Serum in the fourth channel.

Arca is quoted endorsing Trash on iZotope's website:

Trash is by far one of my favorite plugins for years now, and the new one has a ‘scream’ variable parameter which is great with an LFO.