VORTEX_MIX_INVOL_A
VORTEX_MIX_INVOL_A + (((mix << 5) + channel) << 2));
VORTEX_MIX_INVOL_A +
VORTEX_MIX_INVOL_A + (((mix << 5) + mixin) << 2), vol);
addr = VORTEX_MIX_INVOL_A + 0x7fc;
hwwrite(vortex->mmio, VORTEX_MIX_INVOL_A + ((mix << 5) + channel),