'\" t
.\"     Title: snd_ctl_make_virtual_master
.\"    Author: [FIXME: author] [see http://docbook.sf.net/el/author]
.\" Generator: DocBook XSL Stylesheets v1.79.1 <http://docbook.sf.net/>
.\"      Date: January 2017
.\"    Manual: Control/Mixer API
.\"    Source: Kernel Hackers Manual 4.8.15
.\"  Language: English
.\"
.TH "SND_CTL_MAKE_VIRTUAL" "9" "January 2017" "Kernel Hackers Manual 4\&.8\&." "Control/Mixer API"
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.SH "NAME"
snd_ctl_make_virtual_master \- Create a virtual master control
.SH "SYNOPSIS"
.HP \w'struct\ snd_kcontrol\ *\ snd_ctl_make_virtual_master('u
.BI "struct snd_kcontrol * snd_ctl_make_virtual_master(char\ *\ " "name" ", const\ unsigned\ int\ *\ " "tlv" ");"
.SH "ARGUMENTS"
.PP
\fIname\fR
.RS 4
name string of the control element to create
.RE
.PP
\fItlv\fR
.RS 4
optional TLV int array for dB information
.RE
.SH "DESCRIPTION"
.PP
Creates a virtual master control with the given name string\&.
.PP
After creating a vmaster element, you can add the slave controls via
\fBsnd_ctl_add_slave\fR
or
\fBsnd_ctl_add_slave_uncached\fR\&.
.PP
The optional argument
\fItlv\fR
can be used to specify the TLV information for dB scale of the master control\&. It should be a single element with #SNDRV_CTL_TLVT_DB_SCALE, #SNDRV_CTL_TLV_DB_MINMAX or #SNDRV_CTL_TLVT_DB_MINMAX_MUTE type, and should be the max 0dB\&.
.SH "RETURN"
.PP
The created control element, or
\fBNULL\fR
for errors (ENOMEM)\&.
.SH "COPYRIGHT"
.br