000135fc - 00013630

000135fc: 90830016 lbu r3,0x0016(r4)            number of channels
00013600: 248400b8 addiu r4,r4,0x00b8           Skip mus header data
00013604: 00002821 addu r5,r0,r0
00013608: 94820000 lhu r2,0x0000(r4)            has sound
0001360c: 00000000 nop
00013610: 10400004 beq r2,r0,0x00013624         branch if does not have sound
00013614: 2463ffff addiu r3,r3,0xffff
00013618: 8c820034 lw r2,0x0034(r4)             ?
0001361c: 00000000 nop
00013620: 00a22825 or r5,r5,r2                  bitcombine 0x34 value for all that has sound
00013624: 1460fff8 bne r3,r0,0x00013608         branch while not at channels for current mus
00013628: 24840160 addiu r4,r4,0x0160           go to next channel
0001362c: 03e00008 jr r31
00013630: 00a01021 addu r2,r5,r0                return bitcombined ?