Here is the dbmeasure output, my problem is with the center_lfe channel but this tools only records from front. Don't know if this is usefull at all. http://pastie.org/2889724
Noticeable when using Pulseaudio with 5.1 channel. Center volume is almost inaudible even though alsamixer shows every channel is maxed out. The test log shows that the decibels are wrong.
dbverify output: http://pastie.org/2882755