Cardiff County & Vale of Glamorgan Symphonic Brass was founded by Arwel Jenkins in 1991 to give the County's leading school-age brass players the opportunity to play chamber music to the highest standards. The ten-piece ensemble, which has been directed by Matthew Thistlewood since 1993, performs a wide range of music from Renaissance polyphony to contemporary scores. The group, which is made up of 14 - 18 year old musicians, meets for weekly rehearsals at the Friary Centre, home of the Cardiff County & Vale of Glamorgan Music Service.

Symphonic Brass has performed throughout the UK and also abroad, at major venues such as London's Barbican Hall, and Millennium Dome and the Adrian Boult Hall in Birmingham. The Ensemble has premiered a number of new works including the first performance of Gareth Wood's Sea Dogs at the North Wales International Music Festival in September 2011. Symphonic Brass's busy schedule has included concert trips to Norway (1999), Isle of Man (2003) and appearances at the Edinburgh & Glasgow Festival of Youth Orchestras (1996, 1999 & 2001). Other tours and trips have included Kent (1995 & 1996); London (1997, 2000 & 2009); Birmingham (2005); Swansea (2006); York (2007); Manchester (2008); North Wales (2011); Oxford (2012).

The group's versatility has seen it appear at a wide range of events in addition to the usual concerts. They have performed a ceremonial role at many events such as Cardiff County Council's Freedom of the City ceremonies, opening ceremonies and major conferences including the European Congress of Palliative Care.

Over the years, many from the ensemble have represented Wales as members of the National Youth Orchestra, Brass Band or Wind Orchestra and some have also become members of the National Youth Orchestra of Great Britain. A significant number have gone on to study music at university or music college and then into professional music making. Alumni include Andrew Budden (Acting Principal Horn - BBC Philharmonic Orch.), Simon Cox (Principal Trumpet - Aurora Orch.), Daniel Trodden (Principal Tuba - BBC National Orchestra of Wales), Chris Cotter (trumpet), Liz Jones (trumpet), Annette Cox (horn), Stephanie Dyer (trombone) and Martin Hunter (bass trombone).

Highlights of CCVG Symphonic Brass's current season include two Christmas concerts with the Ardwyn Singers and a concert trip to London.