ES_SMPREG_DAC1
es1371_src_write(es, ES_SMPREG_DAC1 + ES_SMPREG_TRUNC_N, 16 << 4);
es1371_src_write(es, ES_SMPREG_DAC1 + ES_SMPREG_INT_REGS, 16 << 10);
dac = (set == ES_DAC1) ? ES_SMPREG_DAC1 : ES_SMPREG_DAC2;