In April 2008 it was announced that Cooper would release a "solo album" under the name Matthew Robert Cooper. Writing on the Temporary Residence message boards Cooper explained the change "this is not far from something "eluvium" would release—but since I began writing them—I felt that they were somehow disconnected from eluvium—perhaps a different personality took shape—thus, the use of a different name - this work is very dear to me." Miniatures was issued in 2008 on a limited vinyl release on the fledgling Portland label, Gaarden Records. The album was limited to 2,000 copies with the first 1,000 on colored vinyl.
Other projects
Cooper has also teamed up with Charles Buckingham, with whom he has worked on the ambient video project titled Window Exchange, to produce the "unedited improvised basement minidisc recordings" of Concert Silence. In the fall of 2007, Concert Silence made 09.22.07 , a 51-minute, six part instrumental piece. In April 2010, Infraction Records released "09.22.07 " on limited edition vinyl and compact disc, alongside a new 12" E.P./CD titled "Rain Furniture". Cooper scored fellow Portlander Matt McCormick's feature film debut Some Days Are Better Than Others, under Temporary Residence Ltd. One of Cooper's original pieces can be heard in the trailer of the film. Another film scored by Cooper is For Thousands of Miles by Mike Ambs. Cooper has released an Eluvium 10" vinyl named "Pedals / Petals" in January 2013, for the Vinyl Films project by film director Cameron Crowe. In January 2014, Pitchfork reported that Cooper and Mark T. Smith of Explosions in the Sky have teamed up to form a new act called Inventions, who will release their first album, a self-titled, on April 1 through Temporary Residence. In September 2016 he released the albumFalse Readings On.
In 2012, Cooper began releasing electronic music under a new moniker, Martin Eden, named after the 1909 Jack London book. Cooper described the debut Martin Eden 7" as something that "may appeal to fans of early Aphex Twin stuff, or turn of the century electronic music." ;Studio albums
Dedicate Function
;Singles
Lefse Records 7"
as Concert Silence
Concert Silence is a collaborative project with Charles Buckingham that began in 2007 ;Studio albums
09.22.07
;EPs
Rain Furniture E.P.
as MRC / PRB
MRC / PRB is a collaborative project with Peter Broderick that began in 2011 ;Singles