Barrett used to work in Cardiff's only electronic record shop, Catapult. A short time after he began to make music, he was given a DJ residency at Cardiff's drum and bass night, named Silent Running. During his residency at Silent Running, Barrett played alongside artists such as Grooverider and London Elektricity.

In June 2002, Barrett's debut album, True Colours, was released on Hospital Records, with "Return of Forever" and "Global Love" finding their way into the UK Singles Chart.  His second album was High Society.
On 6 April 2003, High Contrast was featured on the BBC Radio 1 Essential Mix show. His mix included liquid funk mostly from the Hospital Records label. On 9 January 2005, this Essential Mix was replayed on Radio 1 when another drum and bass artist, Andy C, was unable to deliver his mix. In October 2005, Barrett launched his own record label, The Contrast. The first single, "Days Go By" / "What We Do" was released in early November 2005.
In 2007, he delivered his second effort, selected as 'Essential Mix of the Year' by Pete Tong.   His third album Tough Guys Don't Dance was released in October 2007. The second single from the album, "If We Ever" was supported on Radio 1 by Annie Mac, Zane Lowe and Jo Whiley helping it to reach number 1 in the DnB chart, number 1 in the dance chart and number 4 in the Indie chart.

In 2008, High Contrast remixed the #1 single "No Way to Say" for the Japanese Ayumi Hamasaki's remix album, Ayu-mi-x 6: Silver. He also made successful remixes of "Hometown Glory" by Adele and "Pjanoo" by Eric Prydz, which were later included on album, Confidential. He has started producing house tracks under the alias, 'Two Fisted Tales' with tracks released so far including "Fugue State" and "Rushmore" He played them during his take over for the Rob Da Bank show on BBC Radio 1 in January 2009.

He played at the 2011 Coachella Valley Music and Arts Festival. Barrett currently is a resident DJ at the following clubs: Hospitality as part of Hospital Records at Matter in London (previously at Heaven), Aperture at Clwb Ifor Bach (The Welsh Club) in Cardiff, at Roxy in Prague. He is also on regular rotation at Fabric in London.