On Tue, May 10, 2011 at 11:30:24AM -0400, Paul Davis wrote : > On Tue, May 10, 2011 at 11:14 AM, Joe Hartley <jh@xxxxxxxxxxxx> wrote: > > On Tue, 10 May 2011 10:51:26 -0400 > > Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx> wrote: > >> the data path during export is EXACTLY the same as during normal > >> playback except for the conversion to an integer format. since > >> metering occurs before this, the data the metering displays is > >> IDENTICAL to the data that would be seen during normal playback. > > > > It would seem to me that if the meters are checking their inputs > > n times per second, then if an export is occurring and is running say > > 3 times faster than real time, there is the possibility that a peak > > could happen at a moment that the input isn't being checked, and thus > > the peak levels could be reported differently during export than in > > real time. I wouldn't expect to see a huge difference in the reported > > values, but I can see how this would happen. > > > > Does this make any sense, or have I misunderstood how the meters > > get their values? > > well, the numerical values should match because the actual "peak" > values are based on all data since the last meter update. but its > definitely true that the "graphical" part of the meters could be > different for precisely the reason you mention on the other hand, if > there *is* a difference, its mostly likely to be an error with > metering and not with any difference in the data generated for export. OK, not sure to have all understood, but, by the way, when speaking about vu-meters, I obviously mean "numerical values". It's true that I just trusted those values, and never compared them to the data generated for export. So, just to be sure, I just have to ignore values of meters (including numerical ones?) when exporting, and refering to the ones appearing when listening to my mixes before exporting? By the way, I would have to retry (and I have no time for this today), but I'm almost sure to have got different numerical values from one "realtime listen" to another. I especially remember a session with a zone in which I sometimes get huge saturation (+1dB or more), and the time right after got -0.8dB. It was a very low dynamic region (metal music), and I had to get it the loudest I could, and it was quite a pain. > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user@xxxxxxxxxxxxxxxxxxxx > http://lists.linuxaudio.org/listinfo/linux-audio-user -- Aurélien _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
