EMU_MAX_BUFSZ
sc->bufsz = pcm_getbuffersize(sc->dev, EMUPAGESIZE, EMU_REC_BUFSZ, EMU_MAX_BUFSZ);
if (blksz > EMU_MAX_BUFSZ / EMUPAGESIZE) {
/* maxsize */ EMU_MAX_BUFSZ, /* nsegments */ 1, /* maxsegz */ 0x3ffff,