OSI's fourth album "Fire Make Thunder" was released on March 27, 2012, with Gavin Harrison once again playing drums. During the development process, Kevin Moore kept frequent updates referring to the mixing process of the album on his official Facebook and Twitter accounts Written and recorded throughout most of 2011, this latest release once again reflects the eclectic influences of both Matheos and Moore. Returning as the bands session drummer is Gavin Harrison of Porcupine Tree, this time co-writing one of the tracks with the band. All other instruments and programming were performed by both Matheos and Moore, while vocals and lyrics were handled exclusively by Moore. All of the recording for Fire Make Thunder, with the exception of drums, was done by Moore and Matheos at each musicians respective home studio with drums being recorded at Harrison's home in London. Final overdubs as well as some additional writing/arranging was completed in July 2011 in Jamaica, Iowa where the band mixed alongside engineer matt Sepanic at Sound Farm Studio and recording Environment. Mastering was handled by renowned engineer Roger Siebel. The record was produced by both Moore and Matheos. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.