I found that on AlsaMixer the Master was set to many +db. Placing the slide all the way down puts it at 0 db, where it should be. I have not re-measured the signal levels, but recording from my receiver is now reasonable.
I found it confusing that the slider at the bottom is normal, when slider at the top at the top is normal for other controls. And I do not know why the mixer has the ability to jack up the gain so much, but that is what it can do. Thanks for reading. -Denis On Sat, Dec 29, 2012 at 3:46 PM, Denis Heidtmann <[email protected]> wrote: > I have an Asus M3N78-VM MB with on-board sound only. In trying to > debug overloading of signals using Audacity I found that the line > input produces a full undistorted signal at about 42mV RMS (~115 mV > P-P), and clipping at much above that. These values are confirmed > with Fluke 87 and a Tek scope. The clipping shows up in Audacity. > The web indicates that consumer audio line level signal should be 894 > mV P-P, and my stereo receiver seems to agree that this value is the > correct order of magnitude. > > My MB manual says nothing about what they think line-level is, and > Google did not enlighten me about this type of problem with the MB. I > see no hardware switches on the MB nor anything in the BIOS. > > Anybody have ideas? > > Thanks, > -Denis _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
