EMU8000_ENVVOL_WRITE
EMU8000_ENVVOL_WRITE(emu, ch, 0);
EMU8000_ENVVOL_WRITE(hw, ch, vp->reg.parm.voldelay);
EMU8000_ENVVOL_WRITE(emu, i, 0x8000);
EMU8000_ENVVOL_WRITE(hw, ch, 0x8000);