EMU8000_PEFE_WRITE
EMU8000_PEFE_WRITE(emu, ch, 0);
EMU8000_PEFE_WRITE(hw, ch, vp->reg.parm.pefe);
EMU8000_PEFE_WRITE(emu, i, 0); /* mod envelope height to zero */
EMU8000_PEFE_WRITE(hw, ch, 0x0);