Allmusic: Castor broke through in 1995 just as fellow Champaign-Urbana, IL, art rockers Hum made their major-label debut. While Hum enjoyed more popularity by staying marginally within the bounds of straightforward rock, Castor pressed the limits of spacious, experimental music on their self-titled debut, earning a tour with the Promise Ring and Compound Red that put the band on the indie map. Castor played its last show in January 1998. Tracking Sounds Alone was released posthumously on Mud. Singer/guitarist Jeff Garber (Morning Becomes Electric) and bassist Derek Niedringhaus joined National Skyline.