Adam Levine's Guitar Teacher Carlos Calvo Loved every moment with my old friend, singer/songwriter/ guitarist/teacher Carlos Calvo. It had been far too long since we last chatted, pre-COVID. The world, art, and our lives have changed drastically since then. Carlos, with his wife and daughter, moved to Spain, for one. Most of his work and mine are now online. Gratefully, it felt like we were in the…