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 3.10 June 2014 SND_CTL_ADD_SLAVE(9)
