ENVY24_SAMPLE_NUM
ch->size = 8 * ENVY24_SAMPLE_NUM;
ch->size = ch->unit * ENVY24_SAMPLE_NUM;
sc->blk[slot] = ENVY24_SAMPLE_NUM / 2;
sc->psize = ENVY24_PLAY_BUFUNIT * ENVY24_SAMPLE_NUM;
sc->rsize = ENVY24_REC_BUFUNIT * ENVY24_SAMPLE_NUM;