cliveb;130937 Wrote: > In contrast, upsampling (as the term is generally used) involves > INVENTING additional data (usually by interpolation) in the expectation > that it will deliver improved high frequency resolution. But this extra > data that's invented can't ever be known to be correct. Quite a lot of > the time, it'll be wrong. It doesn't "recreate" the high frequencies > that were discarded when the recording was sampled at whatever lower > frequency was used
Absolutely, I forget who said it but I think the following sums up well the use of asynchronous sample rate conversion (it was said in the context of its use for jitter reduction but the comment is more generally applicable): "it shifts the problem from being the right data at the wrong time to being the wrong data at the right time" ... Pages 18 onwards of the following present a nice discussion on the frequency domain errors introduced: http://www.analog.com/UploadedFiles/Data_Sheets/71654447AD1896_a.pdf Although, the audibility of such errors (or their side-effects) is of course another debate ... :-O -- reeve_mike ------------------------------------------------------------------------ reeve_mike's Profile: http://forums.slimdevices.com/member.php?userid=995 View this thread: http://forums.slimdevices.com/showthread.php?t=26685 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
