SND_CTL_ADD_SLAVE(9) Control/Mixer API SND_CTL_ADD_SLAVE(9)NAMEsnd_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. Returns zero if successful or
a negative error code.
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
COPYRIGHTKernel Hackers Manual 2.6. November 2013 SND_CTL_ADD_SLAVE(9)