Thériault began his professional musical career in 1984 at the age of eighteen in Jonquière, Québec. A co-founder with Denis D'Amour (guitar) he played the bass for VOIVOD, he toured internationally from 1982 to 1991. He is known in the metal world for playing with ferocious attack and for his trademark distortion - the "Blower Bass" sound. His signature bass guitar was designed by him with the colaboration of Mauro Liberatore, a five-string high B. Thériault wanted to play chords which would make the bass sound more like a guitar but bigger.
He composed and recorded six albums on MCA (USA), Noise International (Germany) and Metal Blade (USA) with guitarist Denis "Piggy" D'Amour, drummer Michel "Away" Langevin and singer Denis "Snake" Belanger. Voivod were exploring the concepts of Cyberpunk and state-of-the-art artificial intelligence long before these ideas were assimilated into popular culture.
A co-founder of The Holy Body Tattoo Dance Society, along with choreographers/performers Noam Gagnon and Dana Gingras, from 1992 to 1999 Thériault composed intensely resonant and evocative musical landscapes that left an indelible impression on the contemporary dance world. Through the use of electronic sampling, sequencing and programming, he produced and engineered the full length scores for "White Riot", "Poetry & Apocalypse" (co-composed with Craig Riddock) and "our brief eternity". He toured North America and Europe from 1996 to 1998 as both a sound engineer and a musician. Thériault was awarded 'Best Use of Sound/Music' in 1988 from the Canadian International Annual Film/Video Festival for the film version of "Poetry & Apocalypse".
In 1997 Thériault recorded the "The Electronic Voice Phenomena" CD with Mark Spybey, which was composed using sequencers, samplers, analog keyboards and various sound modules and devices. He continued to create experimental recordings in collaboration with Australian artist Matt Warren. In 2006 they created sound for the performance installation "BUG" presented at CESTA's (Tabor, CZ) 11th Arts Festival in 2006. In February 2008 they presented a piece titled "Hiatus" at Inflight Gallery in Hobart, Tasmania.
Thériault has engineered sound for rock acts such as extreme metal band MARTYR and Montréal hard rockers PRIESTESS. He performed in 2002 with the metal "supergroup" BLACK CLOUD, featuring Pierre Rémillard (OBLIVEON) on guitar, Daniel Mongrain (MARTYR) on guitar, Florent Mounier (CRYPTOPSY) on drums, and Patrick Mireault (GHOULUNATICS) and Marc Vaillancourt (B.A.R.F.) trading off on vocals.
In 2006 Thériault co-produced NEGATIVA's self-titled 3 song EP with Wild Studio's Pierre Rémillard. He recorded the bass track for "Brain Scan" with MARTYR, who included the VOIVOD cover on their latest release "Feeding the Abscess." Thériault performed live with the band at their record launch at Montréal's Medley on November 11, 2006.
In August 2007 Thériault was both the Technical Director and Sound Engineer for "25 ans du Métal Québécois," a three day event featuring twelve seminal Québec metal acts at Montréal's Club Soda. He took part in a medley of Voivod classics with a group that included Daniel Mongrain (MARTYR), Peter Jackson, and Martin Frechette. The performance was in honour of the late VOIVOD guitarist Denis "Piggy" D'Amour, who was inducted into the Quebec Metal Hall Of Fame.
The global touring since 2008’s reformation of Voivod has been extensive (Japan, Chile, Mexico, Europe, Canada, USA) and continues in 2012 with more shows in support of Target Earth and special shows featuring classic Voivod records. The band's line-up consists of Denis "Snake" Bélanger, Michel "Away" Langevin, Jean-Yves "Blacky" Thériault, and Daniel "Chewy" Mongrain on Guitar.
The 13th studio album of Voivod "Target Earth" record was released worldwide by Century Media on Jan 29, 2013. Thériault was the principal composer with Mongrain. He also produced, engineer and edited the album.
Thériault is currently working with Monica Emond on the artistic project call ' Coeur Atomique '.
He finally feels that now the music that he is writing with Monica Emond is meaning something more than just writing Metal riff and it is 100% DIY.
They have released their first album "Landscape of emergency I" available through their website, you can support them by purchaising various items at their website.