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ALSAMIXER(1)		    General Commands Manual		  ALSAMIXER(1)

NAME
       alsamixer - soundcard mixer for ALSA soundcard driver, with ncurses in-
       terface

SYNOPSIS
       alsamixer [options]

DESCRIPTION
       alsamixer is an ncurses mixer program for use with the  ALSA  soundcard
       drivers.	It supports multiple soundcards	with multiple devices.

OPTIONS
       -h, --help
	      Help: show available flags.

       -c, --card <card	number or identification>
	      Select  the  soundcard  to use, if you have more than one. Cards
	      are numbered from	0 (the default).

       -D, --device <device identification>
	      Select the mixer device to control.

       -V, --view <mode>
	      Select the starting view mode, either playback, capture or all.

       -g, --no-color
	      Toggle the using of colors.

MIXER VIEWS
       The top-left corner of alsamixer	is the are to show some	basic informa-
       tion: the card name, the	mixer chip name, the current view mode and the
       currently selected mixer	item.  When the	mixer item  is	switched  off,
       [Off] is	displayed in its name.

       Volume  bars  are  located  below  the basic information	area.  You can
       scroll left/right when all controls can't be put	in  a  single  screen.
       The  name of each control is shown in the bottom	below the volume bars.
       The currently selected item is drawn in red and/of emphasized.

       Each mixer control with volume capability shows a box and  the  current
       volume  filled in that box.  The	volume percentages are displayed below
       the volume bar for left and right channels.  For	a mono	control,  only
       one value is shown there.

       When  a	mixer control is turned	off, M (mute) appears below the	volume
       bar.  When it's turned on, O in green appears instead.  You can	toggle
       the switch via m	key.

       When  a	mixer control has capture capability, the capture flag appears
       below the volume	bar, too.  When	the capture is turned off, -------  is
       shown.	CAPTURE	 in  red appears when the capture switch is turned on.
       In addition, L and R letters appear in left and right side to  indicate
       that left and the right channels	are turned on.

       Some  controls have the enumeration list, and don't show	boxes but only
       texts which indicate the	currently active item.	 You  can  change  the
       item via	up/down	keys.

VIEW MODES
       alsamixer  has  three  view  modes:  playback, capture and all.	In the
       playback	view, only the controls	related	with playback are shown.  Sim-
       ilarly, only the	controls for capture (recording) are shown in the cap-
       ture view.  The all view	mode shows all	controls.   The	 current  view
       mode  is	 displayed  in	the  top-left position together	with the mixer
       name, etc.

       The default view	mode is	the playback view.  You	can change it  via  -V
       option.

       Each  view  mode	 can  be switched via keyboard commands, too.  See the
       next section.

KEYBOARD COMMANDS
       alsamixer recognizes the	following keyboard  commands  to  control  the
       soundcard.   Commands  shown  here  in  upper case can also be given in
       lower case.  To be reminded of these keystrokes,	hit the	h key.

   General Controls
       The Left	and right arrow	keys are used to select	the  channel  (or  de-
       vice,  depending	 on  your  preferred  terminology). You	can also use n
       ("next")	and p ("previous").

       The Up and Down Arrows control the volume for  the  currently  selected
       device. You can also use	+ or - for the same purpose. Both the left and
       right signals are affected. For independent left	and right control, see
       below.

       The  B  or = key	adjusts	the balance of volumes on left and right chan-
       nels.

       M toggles muting	for the	current	channel	(both left and right).	If the
       hardware	 supports it, you can mute left	and right independently	by us-
       ing , (or _) and	. (or _) respectively.

       SPACE enables recording for the current channel.	If any other  channels
       have  recording	enabled,  they will have their recording function dis-
       abled first. This only works for	valid input channels, of course.

       L re-draws the screen.

   View	Mode Controls
       Function	keys are used to change	view modes.  You  can  switch  to  the
       help  mode and the proc info mode via F1	and F2 keys, respectively.  On
       terminals that can't use	function keys like  gnome-terminal,  ?	and  /
       keys can	be used	alternatively for help and proc	modes.

       F3, F4 and F5 keys are used to switch to	playback, capture and all view
       mode, respectively.  TAB	key toggles the	current	view mode circularly.

   Quick Volume	Changes
       PageUp increases	volume by 5.

       PageDown	decreases volume by 5.

       End sets	volume to 0.

       You can also control left & right levels	for the	current	channel	 inde-
       pendently, as follows:

       [Q | W |	E ]  --	turn UP	[ left | both |	right ]

       [Z | X |	C ] -- turn DOWN [ left	| both | right ]

       If  the	currently selected mixer channel is not	a stereo channel, then
       all UP keys will	work like W, and all DOWN keys will work like X.

       The number keys from 0 to 9 are to change the absolute volume  quickly.
       They correspond to 0 to 90% volume.

   Selecting the Sound Card
       You  can	 select	another	sound card by pressing the F6 or S keys.  This
       will show a list	of available sound cards to choose from, and an	 entry
       to enter	the mixer device name by hand.

   Exiting
       Quit  the  program with ALT Q, or by hitting ESC.  Please note that you
       might need to hit ESC twice on some terminals since it's	regarded as  a
       prefix key.

VOLUME MAPPING
       In  alsamixer, the volume is mapped to a	value that is more natural for
       a human ear.  The mapping is designed so	that the position in  the  in-
       terval  is proportional to the volume as	a human	ear would perceive it,
       i.e. the	position is the	cubic root of the linear sample	multiplication
       factor.	 For  controls with a small range (24 dB or less), the mapping
       is linear in the	dB values so that each step has	 the  same  size  vis-
       ually.

       Only for	controls without dB information, a linear mapping of the hard-
       ware volume register values is used (this is the	same algorithm as used
       in the old alsamixer).

SEE ALSO
	amixer(1), aplay(1), arecord(1)

BUGS
       Some  terminal  emulators  (e.g.	 nxterm) may not work quite right with
       ncurses,	but that's their own damn fault. Plain old xterm seems	to  be
       fine.

AUTHOR
       alsamixer  has  been  written by	Tim Janik and been further improved by
       Jaroslav	   Kysela     <perex@perex.cz>	   and	   Clemens     Ladisch
       <clemens@ladisch.de>.

       This manual page	was provided by	Paul Winkler <zarmzarm@erols.com>.

				  22 May 2009			  ALSAMIXER(1)

NAME | SYNOPSIS | DESCRIPTION | OPTIONS | MIXER VIEWS | VIEW MODES | KEYBOARD COMMANDS | VOLUME MAPPING | SEE ALSO | BUGS | AUTHOR

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