Alexander Brandon (also known as Siren in the demoscene and tracker community, born 1974) is a US musician, former member of Straylight Productions, who composed music mostly for games produced by Epic Games, or games based on Epic technology, including Unreal, Unreal Tournament, Deus Ex, Tyrian, Jazz Jackrabbit 2 and the cancelled game Jazz Jackrabbit 3D. Alexander is also a voice actor, having been cast most recently for the parts of Ancano and Amaund Motierre in the Role Playing Game The Elder Scrolls V: Skyrim by Bethesda Game Studios.

Brandon started composing music at the age of 14 when he got an Ad Lib music synthesizer card for Christmas. He worked in several MOD music groups over his composing years in the late 90's, including the Kosmic Free Music Foundation. During that time he also composed for several musicdisks such as Return to Stage 9.