Note : I figured out my problems while writing this email, but I am posting 
anyway in case it can help others.

I recently bought Logitech Z-560 speakers and I was at first deceived by 
them. I am using Debian and ALSA-0.9rc1 and MP3s were playing with too much 
bass...

Then I tried a CD. Suprise -- it played just fine. Without the boomy bass I 
heard with MP3s.

I rebooted to Windows. Surprise also -- MP3s seemed just fine.

I then looked for a decent alsa mixer and I finally found "alsamixer" from 
alsa-utils. Great color console program -- but I do not know what half of the 
mixer settings do :)

After some experimentation I figured out that I could actually use my rear 
speakers by using the "Wave Surround" slider. Great!

I also figured out that my boomy bass was caused by the "Tone" slider being 
muted. A press on "m" on the keyboard got rid of the problem -- and enabled 
the "Bass" and "Treble" sliders.

The only problem was that it sounded more flat now, specially when "Bass" and 
"Treble" are at 0%. I then realized that Tone muted == Bass and Treble to 
50%. (Can somebody confirm?)

So for now I set Bass = 35% and Treble = 50%. MUCH better :)

Hope this email helped somebody.

Guillaume Pratte


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