* The first new R4 disc in two decades has been released by Fusion Audio Recordings. It's also available on Bandcamp.
* Two new R4 tracks titled "Initiator [Beehive Cluster]" and "Heard Immunity" are available for free via Fusion Audio's Bandcamp page.
* R4 contributed a track based on H.P. Lovecraft's poem "Christmastide" to Zaftig Research's 2021 noise/experimental holiday composition, Warm Holiday Wishes.