Strange soundcard volume problem


When I go to soundcard configuration in YaST and put volume to max, sound is, let’s say, 100% loud.
However, within applications like Amarok and all others, even though internally (within application) is set to 100%, volume is about 70% of what I hear in YaST.

At first I thought it is MP3 loudness, but no matter what I play, it is the same volume (varies a little depending on file), but generally, lower then YaST’s 100%.

What could be the problem?