Three-piece instrumental metal outfit Russian Circles makes the kind of big, epic, discordant music that’s bound to fill a room—with sound at the very least. Like their Chicago brethren Pelican, Russian Circles is part of that dark yet delicate rock movement that eschews vocals but imparts a tremendous amount of feeling through the use of samples and loop pedals. Recently chosen to support Tool through their 2007 UK tour, Russian Circles is riding a post-rock wave and gearing up to release a new album, Station, in the coming spring. Opening for them at Soundlab on Saturday (Feb 23) are Dalek and Young Widows. The show starts at 9pm.