14 Oct
2010
14 Oct
'10
10:30 a.m.
2010/10/14 Valentine Sinitsyn valentine.sinitsyn@gmail.com
Do you mean that you want to add that "subwoofer" control which is
connected the the master mono pin of the codec to the slave controls of the virtual master volume control ?
Yes, except "subwoofer" control is to be connected to subwoofer's own pin (for instance, 0x17 on Lenovo machines). Subwoofer pins I've seen so far have their own output amplifier with mute.
There are laptop which has 2.1 speakers which subwoofer is connected to master mono pin of the STAC codec , The ".1" subwoofer is most likely the result of a Low pass filter attached to the mono pin
Seem that your Lenovo are not using ALC670, it is hard to make any comment without knowing the output of alsa-info.sh