MPlayer has two options for increasing volume above the sound card's maximum setting. Adjusting MPlayer's software volume, or using an audio filter to amplify the audio.

I had a problem where my DVD's would play too quiet, even when the volume was maxed out. Using this I was able to adjust the volume so the DVD would play at the same volume as any other video and i wouldn't have to readjust it each time a changed between them.

The Audio filter method tends to work better

Contents 1 Software Volume 2 Audio filter (volume increase) 3 Audio filter (volume normalizer) 4 References

Software VolumeEdit

Software Volume or softvol adjusts you volume using software amplification, not your sound cards hardware volume

• To use it add:
  • -softvol −softvol-max <10.0−10000.0>
  • To set the maximum amplification level in percent (default: 110). A value of 200 will allow you to adjust the volume up to a maximum of double the current level. With values below 100 the initial volume (which is 100%) will be above the maximum, which e.g. the OSD cannot display correctly.
• Example
  • mplayer -softvol -softvol-max 200 media.avi

Audio filter (volume increase)Edit

You can turn on an audio filter to increase the volume

• To use it add :
  • -af volume=<v>:<sc>

    Where

    • <v> is the desired gain in dB for all channels in the stream from -200dB to +60dB, where -200dB mutes the sound completely and +60dB equals a gain of 1000 (default: 0).
    • <sc> Turns soft clipping on (1) or off (0). Soft-clipping can make the sound more smooth if very high volume levels are used. Enable this option if the dynamic range of the loudspeakers is very low.
• Example:
  • mplayer −af volume=10.1:0 media.avi

Audio filter (volume normalizer)Edit

Maximizes the volume without distorting the sound.

• • mplayer −af volnorm media.avi

ReferencesEdit

• MPlayer options
• MPlayer audio filter options
  
  
  From HowTo Wiki, a Wikia wiki.