2 .\" Copyright (c) 2021 Christos Margiolis <christos@FreeBSD.org>
4 .\" Permission is hereby granted, free of charge, to any person obtaining a copy
5 .\" of this software and associated documentation files (the "Software"), to deal
6 .\" in the Software without restriction, including without limitation the rights
7 .\" to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 .\" copies of the Software, and to permit persons to whom the Software is
9 .\" furnished to do so, subject to the following conditions:
11 .\" The above copyright notice and this permission notice shall be included in
12 .\" all copies or substantial portions of the Software.
14 .\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 .\" IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 .\" FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 .\" AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 .\" LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 .\" OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
27 .Nd manipulate soundcard mixer controls
33 .Op Ar dev Ns Op Cm \&. Ns Ar control Ns Op Cm \&= Ns Ar value
44 utility is used to set and display soundcard mixer device controls.
46 The options are as follows:
47 .Bl -tag -width "-f device"
49 Print the values for all mixer devices available in the system
52 Change the default audio card to
54 The unit has to be an integer value.
55 To see what unit values are available, look at the number each mixer device has by running
65 Print mixer values in a format suitable for use inside scripts.
66 The mixer's header (name, audio card name, ...) will not be printed.
68 Print only the recording source(s) of the mixer device.
71 The list of mixer devices that may be modified are:
72 .Bd -ragged -offset indent
73 .Cm vol , bass , treble , synth , pcm , speaker , line , mic , cd , mix ,
76 .Cm line1 , line2 , line3 ,
77 .Cm dig1 , dig2 , dig3 ,
78 .Cm phin , phout , video , radio ,
83 Not all mixer devices are available.
85 Without any arguments,
87 displays all information for each one of the mixer's supported devices to
91 argument is specified,
93 displays only the values for
95 More than one device may be specified.
97 Commands use the following format:
98 .Bl -column xxxxxxxxxxxxxxxxxxxxxxxx -offset indent
99 .It Sy Name Ta Sy Action
100 .It Ar dev Ta Display all controls
101 .It Ar dev Ns Cm \&. Ns Ar control Ta Display only the specified control
102 .It Ar dev Ns Cm \&. Ns Ar control Ns Cm \&= Ns Ar value Ta Set control value
105 The available controls are as follows (replace
107 with one of the available devices):
109 .Bl -column xxxxxxxxxxxxxxxxxxxxxxxx -offset indent
110 .It Sy Name Ta Sy Value
111 .It Ar dev Cm .volume Ta Xo
113 .Oo Cm \&+ | Cm \&- Oc Ar lvol Oo % Oc
114 .Oo Cm \&: Oo Cm \&+ | Cm \&- Oc Ar rvol Oo % Oc Oc
116 .It Ar dev Cm .mute Ta Cm 0 | 1 | ^
117 .It Ar dev Cm .recsrc Ta Cm ^ | + | - | =
122 .Ar dev Ns Cm .volume
123 control modifies a device's volume.
128 values have to be specified.
129 The values should typically be decimal numbers between 0 and 1 with at most 2
130 digits after the decimal point.
131 A trailing percent sign indicates that the value should be treated as a
132 percentage of 1.0, rather than an absolute value.
133 Thus, 70% means the same as 0.7.
134 If the left or right volume values are prefixed with
138 the value following will be used as a relative adjustment, modifying the
139 current settings by the amount specified.
140 Note that relative percentages are still relative to 1.0, not to the current
142 If the volume is currently 0.40 and an adjustment of +20% is specified, then
143 thet final volume will be set to 0.60.
145 Volume can also be set using the shorthand
146 .Ar dev Ns Cm =value .
147 This syntax does not apply to other controls.
151 control (un)mutes a device.
152 The following values are available:
153 .Bl -tag -width = -offset indent
166 .Ar dev Ns Cm .recsrc
167 control modifies the recording sources of a mixer.
169 marks devices which can be used as a recording source with
171 Recording sources are marked with
173 To modify the recording source you can use one of the following modifiers
177 .Bl -tag -width = -offset indent
181 of possible recording devices
185 to possible recording devices
189 from possible recording devices
191 sets the recording device to
195 .Bl -tag -width /dev/mixerN -compact
197 The mixer device, where
199 is the number of that device, for example
201 PCM cards and mixers have a 1:1 relationship, which means that
208 prints both the audio card's number and the mixer associated with it
213 file, although it does not exist in the filesystem, points to the default
214 mixer device and is the file
218 option has not been specified.
221 Change the volume for the
225 mixer device to 0.65:
226 .Bd -literal -offset indent
227 $ mixer -f /dev/mixer0 vol.volume=0.65
232 device's left volume by 0.10 and decrease the right
234 .Bd -literal -offset indent
235 $ mixer mic.volume=+0.10:-0.05
240 .Bd -literal -offset indent
249 .Bd -literal -offset indent
250 $ mixer mic.recsrc=+ line.recsrc=^
255 information to a file and retrieve back later:
256 .Bd -literal -offset indent
257 $ mixer -f /dev/mixer0 -o > info
259 $ mixer -f /dev/mixer0 `cat info`
268 utility first appeared in
270 and was rewritten completely in
273 .An Christos Margiolis Aq Mt christos@FreeBSD.org