Machine Translations is the performing name of Greg James Walker (born 1967), an Australian singer, songwriter and multi-instrumentalist; who is also a producer as J Walker. Walker started out recording all instruments himself in a home studio and later branched out to include a band.

Machine Translations' songs vary between simple guitar melodies and complex works with unusual instruments—a spectrum from pop to art. Since 1997 Walker has released several albums. In 2001 he toured the United States supporting Dirty Three. As a composer Walker has been nominated at the APRA Music Awards of 2005 for Best Music for a Documentary for Girl in a Mirror: A Portrait of Carol Jerrems; in 2008 for Best Soundtrack Album for East of Everything; and in 2012 for Best Music for a Television Series or Serial and Best Television Theme for Miss Fisher's Murder Mysteries.