Archspire have premiered a new song titled “Involuntary Doppelgänger,” via Metal Injection. This song is from their new album “Relentless Mutation,” which will receive be released on September 22. The band commented: “‘Involuntary Doppelgänger‘ is the first track from our upcoming release ‘Relentless Mutation.” We are extremely proud of what we were able to accomplish…