EMU_CHAN_CVCF
emu_wrptr(sc, ch, EMU_CHAN_CVCF, 0xffff);
emu_wrptr(sc, ch, EMU_CHAN_CVCF, 0);
emu_wrptr(sc, v->vnum, EMU_CHAN_CVCF, EMU_CHAN_CVCF_CURRFILTER_MASK);
emu_wrptr(sc, v->vnum, EMU_CHAN_CVCF, 0xffffffff);
emu_wrptr(sc, v->vnum, EMU_CHAN_CVCF, 0x0000ffff);
emu_wrptr(sc, v->vnum, EMU_CHAN_CVCF, EMU_CHAN_CVCF_CURRFILTER_MASK);
emu_wrptr(sc, v->vnum, EMU_CHAN_CVCF, 0xffffffff);
emu_wrptr(sc, v->vnum, EMU_CHAN_CVCF, 0x0000ffff);
emu_wrptr(sc, ch, EMU_CHAN_CVCF, 0xffff);
emu_wrptr(sc, ch, EMU_CHAN_CVCF, 0);
#define EMU_CHAN_CVCF_CURRVOL EMU_MKSUBREG(16, 16, EMU_CHAN_CVCF)
#define EMU_CHAN_CVCF_CURRFILTER EMU_MKSUBREG(16, 0, EMU_CHAN_CVCF)