2010/4/7 Nicolo' Chieffo <nicolo.chieffo@xxxxxxxxx> > This is what I'm doing: > - got a jack-jack audio cable > - connected the headphone to the mic > - open alsamixer and put everything to 0 dB > - verified that the pass-throw works by using the sound recorder > > ./dbmeasure plughw:0 dbmeasure_hw.log > > exits with this error: > Have you ask the author of "dbmeasure" ? > > Iteration 1, level is 0 (-inf dB). > Volume level measured (0) was too high or too low. > Please adjust mixer so that initial level is between 0.8 and 0.97. > Test run canceled. > > > I've also tried to put the mic level at 100% (22.50 dB) but the output > is the same. > your card seem to support 16/20/24bits if you right shift your 16/24 bits digital audio by 16/24 bits , the digital data are always zero so any software atten on a 16/24bits sound card is still a finite negative number dB instead of -inf dB that 's why the professional user prefer 32bits sound card _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
