The most intriguing solo project to rise from the Walkmen ash is not from former front man Hamilton Leithauser, but rather the band’s bass/organ player Peter Matthew Bauer. The latest track from his solo debut, Liberation! (6/24), comes in the form of “Philadelphia Raga.” Leading off with a worn down instrumental, which recalls the Walkmen’s dreamy “Line by Line,” the song turns into a drifty folk number in the likes of Cass McCombs and even Calexcio.