One more note (not a criticism at all, just more information); It's common for reconstruction anti-imaging filters to allow some aliasing in the reproduced transition band... that is, they don't slam to zero between 20050 and 22050, they actually use 4kHz, from 20 to 24kHz or so. Since the aliasing happens in the folded transition band, it's still all up above 20kHz. Embedded hardware is normally more constrained than software on full sized CPUs, and every extra gate is money (so I'm told)... OTOH, I'm also used to seeing modern Sigma-Delta designs do ~ no output filtering at all. You can't use them in demos with oscilloscopes :-) Monty _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
