VORTEX_MIX_VOL_B
temp = hwread(vortex->mmio, VORTEX_MIX_VOL_B + (mix << 2));
hwwrite(vortex->mmio, VORTEX_MIX_VOL_B + (mix << 2), vol);
addr = VORTEX_MIX_VOL_B + 0x3c;