I have Suse 10.1, Unbuntu and Win98se on my box. Using either linux versions
the volume has to be quite high for mp3, cd music or dvd films. If I forget and switch to Win98 without adjusting the sound it is blasting. Indeed its about a quarter on the speaker dial in Win98 and threequarters in Linux for the same volume.
I have a SIS SI7012 card (AC97 codex)