Scrap Iron Sun

If the songs on Scrap Iron Sun’s latest effort, “Recycled,” sound as raw and unhinged as if the band has already been playing them live aggressively for years, it’s because many of the songs have been making the rounds as part of the band’s repertoire almost since the 2009 release of their debut album, “Getting a Rusty Tan.” However, this hasn’t stopped the inventive quartet from West Springfield, Massachusetts, from tinkering even with the songs that their fans are most familiar with.