XONAR_STX_FRONTDAC
i2c_write(devc, XONAR_STX_FRONTDAC, 16, mix_scale(75, 8));
i2c_write(devc, XONAR_STX_FRONTDAC, 17, mix_scale(75, 8));
i2c_write(devc, XONAR_STX_FRONTDAC, 18, 0x30 | 0x80);
i2c_write(devc, XONAR_STX_FRONTDAC, 19, 0); /* ATS1/FLT_SHARP */
i2c_write(devc, XONAR_STX_FRONTDAC, 20, 0); /* OS_64 */
i2c_write(devc, XONAR_STX_FRONTDAC, 21, 0);
i2c_write(devc, XONAR_STX_FRONTDAC, 16, mix_scale(left, 8));
i2c_write(devc, XONAR_STX_FRONTDAC, 17, mix_scale(right, 8));