An 80-minute live album is inherently demanding, whether from the most lucrative bands of all time or polyphonic instrumental chamber-folk ensembles. Led by guitarist and composer Michael Cormier-O’Leary, Philadelphia’s Hour falls into the latter category, wielding hardscrabble mosaics of gentle guitar licks, glowing winds and strings, and personnel ranging from a quartet to a baker’s dozen. Their latest release, Subminiature, collects bits of recent performances, equally highlighting all of their studio LPs and featuring most of the membership from Ease the Work, their 2024 release.