jt25741;231080 Wrote: > Indeed. Nyquist says that any frequency above 2X the sampling frequency > is garbage, and must be thrown out(filtered).
The key word here is *must*. Its not optional, you must do it. And one of the claims in favor of higher sample rates, and oversampling in general, is that you can use simpler filter circuits. Many early systems had 12dB/octave filters, which really screw up phase. The designers needed the steep slope to avoid causing massive aliasing problems. With 88.2kHz, you can use a 6dB/octave filter and be as free of aliases as a 44.1 with a 12dB/octave filter. The 16 vs 24 argument is less well grounded. Since recording engineers consider -70 dB to be gone, the 96dB provided by 16 bits is overkill, in theory. But there are established audible tests that show that dithering of the 16 bit signal is important. With a few more bits, dithering becomes less important. And in the days of PCs with RAM enough to hold an entire RedBook CD in memory, adding a few bits is easy and cheap. -- pfarrell Pat http://www.pfarrell.com/music/slimserver/slimsoftware.html ------------------------------------------------------------------------ pfarrell's Profile: http://forums.slimdevices.com/member.php?userid=200 View this thread: http://forums.slimdevices.com/showthread.php?t=38596 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
