Turns out Druski wasn't the one calling the shots when a saxophone played SZA and Doechii offstage during their acceptance speeches at the BET Awards ... it was production. A source close to production tells TMZ ... producers decided to have a saxophonist start playing during SZA and Doechii's BET Awards acceptance speeches Sunday night in an effort to keep the broadcast on schedule. We're told Druski wasn't even in a position to call the audible ... he was backstage changing clothes when it