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Old 07-18-2005, 08:15 AM   #1
desperate_penguin
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Registered: Jul 2005
Location: Ankara, TR
Distribution: Fedora Core 4
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XMMS sound quality


I recently started my partial migration from WinXP to Mandrake 9.0. I installed Mandrake 9.0 and booted it... When I opened XMMS to play some music, I noticed the sound quality had a remarkable difference. It looked like I was listening to the radio!!! I had read that this (any compressed audio really) caused problems with the ear. That is not the point anyway. MAndrake has no problem with recognizing and installing my C-MEdia Onboard Sound Card which produced crystal clear sound with XP.

I am a complete noob. So just wondered: Is this a known change or just my machine??

Thought you'd like to know...
 
Old 07-18-2005, 09:16 AM   #2
SpiderIRE
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compression for audio isn't the problem! the way they compress audio generally doesn't have THAT great an impact on the sound quality! if the bitrate is extremely low then you might have a problem - or if Aliasing has occured due to a lower than needed sampling rate then obviously you'll have problems! (if you want more info about the ear and compressed audio, search Google for 'Masking' - this is the basic principle behind audio compression)!

what do you mean by it sounds like a radio?? radio broadcasts at a lower sample rate than CD's do (i think its 32kHz instead of 44.1kHz). so the sound quality dips a bit......but it shouldn't sound THAT bad!

if you mean it sounds distorted then try lowering your PCM volume control for the overall sound level! the same way you would lower the overall volume settings on a windows system!

-David
 
Old 07-18-2005, 09:33 AM   #3
desperate_penguin
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Just wait a second...

When I got in the console earlier, in one of the root folders when I typed ls, it listed the filenames and the "aliasing" filename was flashing red and white!!!! Does that give you any clues?

Sorry I'm a total noob, but I'll get to be like you guys some day I guess...
 
Old 07-18-2005, 11:36 AM   #4
SpiderIRE
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ok first off-the aliasing thing-just ignore what i said about it ealier-its a digital audio term which probably has nothing to do with your problem!

so i'll try and make this as simple as possible for you:

1) make sure the file you are trying to play is alright (i.e. it works and sounds fine!)
2) Don't turn any volumes up too much or you will over load things - don't turn up the volume of XMMS all the way, and don't turn up your speakers full pelt either!
3) Now i'm not 100% sure about mandrake (cause i've only ever used Knoppix and FC2/3) - but there is a program called KMix* (you'll have this or something similar), find it!!! in the output section make sure your not overloading anything, and more importantly, there is a slider called PCM (Pulse Code Modulation) - MAKE SURE this isn't turned up fully! generally if you overload this, you'll get a distorted sound no matter what!!

try this and let me know what happens!

-David

* Windows has the same type of program if you double click the little speaker on the right hand task bar it opens a mixer window with controls for overall volume, CD volume, line in etc.
 
Old 07-18-2005, 12:27 PM   #5
robdigital
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Check what sound plugin Xmms is configured to use. Make sure you are using ALSA and not OSS. I have noticed there is a huge difference in sound quality between the two.
 
Old 07-18-2005, 01:39 PM   #6
windowsrefugeeX
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If I may, how come you are using mdk9.0?? why not go 4 10.2? it would have the "latest" alsa driver.
 
  


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