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.

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.

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

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

Arca can be seen using the Arturia Pigments 3 VST at 0:04 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.

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.