SND_CTL_ADD_SLAVE(9)                    Control/Mixer API                    SND_CTL_ADD_SLAVE(9)



NAME
       snd_ctl_add_slave - Add a virtual slave control

SYNOPSIS
       int snd_ctl_add_slave(struct snd_kcontrol * master, struct snd_kcontrol * slave);

ARGUMENTS
       master
           vmaster element

       slave
           slave element to add

DESCRIPTION
       Add a virtual slave control to the given master element created via
       snd_ctl_create_virtual_master beforehand.

       All slaves must be the same type (returning the same information via info callback). The
       function doesn't check it, so it's your responsibility.

       Also, some additional limitations: at most two channels, logarithmic volume control (dB
       level) thus no linear volume, master can only attenuate the volume without gain

RETURN
       Zero if successful or a negative error code.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                      SND_CTL_ADD_SLAVE(9)