Intervals exist as the unbound and unapologetic creative expression of Aaron Marshall. The progressive guitar rock faithful revere Marshall for his virtuoso chops and melodic prowess in equal measure. His distinctive character and musical personality shine throughout the heady, catchy, and transcendent instrumental compositions found across the ever-growing catalog of Intervals albums. The music is a window into the Toronto, Ontario, guitarist’s mind, body, and soul. Songs like “Libra,” “5-HTP,” “Belvedere,” “I’m Awake,” and “mnemonic” rank among the most popular in the genre. Metal Injection describes Intervals as “catchy-as-hell shred.” Sonic Perspectives declared the band’s fourth album, 2020’s Circadian, “strikes the perfect balance between shred, songwriting, and melody.”
The earliest Intervals offerings, including two EPs and 2014’s full-length debut, A Voice Within (the sole album with lead vocals), were decidedly heavy and aggressive. Heralded by MetalSucks as “fantastic” and “lacking virtually nothing,” 2015’s The Shape of Colour ventured in a new direction. Intervals’ fourth album was appropriately titled The Way Forward. “Employing many of the same techniques as technical progressive metal but in a major-key, upbeat framework has been Intervals’ calling card,” wrote Metal Hammer. “[The Way Forward] is a purer distillation of [Marshall’s] aim.”