Surely oversampling has to be at a whole multiple of the original sampling frequency and synchronised to the original clock source, so for 44.1kHz, 4x would be 176.4kHz or 8x would be 352.8kHz, hence subject to jitter caused by clocking errors. Upsampling on the other hand uses more advanced signal processing to resample the datastream in a fashion that is unrelated to the clock speed of the original and then reclocks the resampled datastream hence reducing jitter errors. In my book that does not necessarily make the recreated analogue samle more accurate but does eliminate jitter. The theory goes that the problems related to oversampling are primarily caused by jitter and that if the original analogue signal has been compromised anyway by A/D conversion in the first place, further chopping up of the signal won't make it any worse provided that the demon jitter is removed. Of course whether you subscribe to this view is largely a matter of personal opinion as is everything in audiophilia.
The other thing to note is that you could upsample at 4x or 8x the original sampling frequency but this not be oversampling because it is essentially then isochronous rather than synchronous. -- adrianh1960 ------------------------------------------------------------------------ adrianh1960's Profile: http://forums.slimdevices.com/member.php?userid=5421 View this thread: http://forums.slimdevices.com/showthread.php?t=32940 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
