On Sun, 21 Dec 2008, Jamie Lokier wrote: > > But then there's people who say that all analogue output above 20kHz > or so is pointless anyway. :-) (I have no opinion either way on this. > On the one hand, they could be right. The upper auditory limit is > well known. On the other hand, there is a possibility that IMD occurs > in the ear due to physical non-linearity, making it able to extract > information from higher frequencies in a rich sound field, even though > those frequencies cannot be heard by themselves). IF there were any energy there, you could be right. But there isn't or should not be. recordings should roll off the audio above 20KHz, and anyway music etc has no energy there anyway, and the ear is very insesitive to it as well. There are no components of the sound to introduce the IMD from whatever non-linearity. > > -- Jamie > > ------------------------------------------------------------------------------ > _______________________________________________ > Alsa-user mailing list > Alsa-user@xxxxxxxxxxxxxxxxxxxxx > https://lists.sourceforge.net/lists/listinfo/alsa-user > -- William G. Unruh | Canadian Institute for| Tel: +1(604)822-3273 Physics&Astronomy | Advanced Research | Fax: +1(604)822-5324 UBC, Vancouver,BC | Program in Cosmology | unruh@xxxxxxxxxxxxxx Canada V6T 1Z1 | and Gravity | www.theory.physics.ubc.ca/ ------------------------------------------------------------------------------ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
