The guitar solos Warren Haynes plays do more than dazzle and burn. They sing. A big reason is Haynes, a legend for his playing with the Allman Brothers Band and Gov’t Mule, was into singing before ...

Just under a century ago, it wasn’t totally clear yet what was jazz and what was blues, or what was becoming R&B and what would soon turn into rock ’n’ roll. And the guitar was near the ...