ralphpnj wrote: > > How are these "filters" different from a simple graphic equalizer or > simple DSP or even, god forbid, tone controls? > When the sampling rate is increased, "images" of the original signal are created at higher frequencies - the up-sampling (anti-imaging) filters are intended to remove these. Any filter placed after the DAC up-sampling stage could do a similar job in principle. In fact NOS DACs rely on the fact that amps, speakers, ears - all after the DAC output - are natural filters. And even up-sampling DACs use a combination of digital and analogue anti-imaging filters.
But if the filter is applied (e.g. with equaliser in a computer player) before up-sampling, it won't be doing the same job. You can -up-sample and filter- on a computer, and pass the music at the higher sample rate to the DAC. This could avoid a stage of up-sampling and filtering in a typical DAC (but with typical DACs there is more than one stage). Check it, add to it! http://www.dr.loudness-war.info/ SB Touch ------------------------------------------------------------------------ darrenyeats's Profile: http://forums.slimdevices.com/member.php?userid=10799 View this thread: http://forums.slimdevices.com/showthread.php?t=106979 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/mailman/listinfo/audiophiles
