MThd MTrk = X Y Q y d @ [ ] ! HPH 1APGA EPGE EPE 1CPC 1APGA EPGE HPGH GPGG GPG 1HPH 1EPE 1CPGC APGA FPF 1CPC 1@PG@ CPGC HPGH FPGF FPF 1EPE 1APA 1@PG@ APGA CPC 1