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.
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