[Mplayer-cvslog] CVS: main/DOCS sound.html,1.68,1.69

[Anders Johansson]

Hi,

IMO this is a really bad change. The reason is that the PCM sound
level is a digital control, while the MASTER is an analog
control. This means that when lowering the PCM sound level the SNR is
lowered. If one then compensates by increasing the MASTER level the
result is a output signal with poor dynamic range combined with the
noise created by the crappy amplifier on the sound card.

//Anders


> Update of /cvsroot/mplayer/main/DOCS
> In directory mail:/var/tmp.root/cvs-serv28122
> 
> Modified Files:
> 	sound.html 
> Log Message:
> use MASTER instead of PCM
> 
> 
> Index: sound.html
> ===================================================================
> RCS file: /cvsroot/mplayer/main/DOCS/sound.html,v
> retrieving revision 1.68
> retrieving revision 1.69
> diff -u -r1.68 -r1.69
> +++ sound.html	29 Jan 2003 22:20:36 -0000	1.69
> @@ -482,7 +482,7 @@
>  <P>Software volume control is implemented by the <CODE>volume</CODE> audio
>    filter. Use this filter with caution since
>    it can reduce the signal to noise ratio of the sound. In most cases it is best
> -  to set the level for the PCM sound to max, leave this filter out and control
> +  to set the level for the MASTER sound to max, leave this filter out and control
>    the output level to your speakers with the master volume control of the mixer.
>    If there is an external amplifier connected to the computer (this is almost
>    always the case), the noise level can be minimized by adjusting the master
> @@ -753,7 +753,7 @@
>    sound level. The initial sound level can be set to values between 0
>    and 255 and defaults to 101 which equals 0dB amplification. Use this
>    plugin with caution since it can reduce the signal to noise ratio of
> -  the sound. In most cases it is best to set the level for the PCM
> +  the sound. In most cases it is best to set the level for the MASTER
>    sound to max, leave this plugin out and control the output level to
>    your speakers with the master volume control of the mixer. If there is an
>    external amplifier connected to the computer (this is almost always
> 
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