[arch-general] amixer usage

[John Davis]

Hello

I am trying to get my multimedia volume up and down buttons to work.  I am
reading various notes on amixer usage
and it seems for others they can adjust current volume settings up and
down.  For me, i can only adjust to a fixed value.

For example, this will set my volume to 50%

[davis at x200 ~]$ amixer -c 0 cset numid=15,iface=MIXER,name='Master Playback
Volume' 50%
numid=15,iface=MIXER,name='Master Playback Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=74,step=0
  : values=37
  | dBscale-min=-74.00dB,step=1.00dB,mute=0

But then if I want to adjust it by 2dB it will not adjust up or down by 2dB
instead it sets the value to 2.

 If I set it to 2dB+ or simply the value 2 it does the same thing.

[davis at x200 ~]$ amixer -c 0 cset numid=15,iface=MIXER,name='Master Playback
Volume' 2dB-
numid=15,iface=MIXER,name='Master Playback Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=74,step=0
  : values=2
  | dBscale-min=-74.00dB,step=1.00dB,mute=0

[davis at x200 ~]$ amixer -c 0 cset numid=15,iface=MIXER,name='Master Playback
Volume' 2dB
numid=15,iface=MIXER,name='Master Playback Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=74,step=0
  : values=2
  | dBscale-min=-74.00dB,step=1.00dB,mute=0
dB up, it will instead set the value to 2 instead of 39.

[davis at x200 ~]$ amixer -c 0 cset numid=15,iface=MIXER,name='Master Playback
Volume' 2dB+
numid=15,iface=MIXER,name='Master Playback Volume'
  ; type=INTEGER,access=rw---R--,values=1,min=0,max=74,step=0
  : values=2
  | dBscale-min=-74.00dB,step=1.00dB,mute=0


It appears the parser is ignoring dB and or +/- and only recognizing %.


-- 
John F. Davis
6 Kandes Court
Durham, NC 27713
919-888-8358

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