Bernhard said:So resolution at 20kHz is only one bit out of 16bits for each halfwave ?
You still have 16 bit resolution, but only 1 sample (with 16 bit resolution) for every half wave.
soongsc said:I don't like it either, You can analyze frequency content from real data, but the reverse is not totally possible. DVD audio and some newer stuff are going to higher sample rates. I spersonnaly like 10 samples per sine wave, but there might be some other theory indicating that possible increasing the number of bits provide more significant improvements.
Originally posted by Francis_Vaughan
Um, no. You have very good phase resolution. In fact if you have a full height (i.e. +32,767 to -32,768) sine wave at 20kHz you have a phase resolution of well under 1/100th of a degree. At lower amplitudes it drops proportionally. Only at an amplitude of the LSB do you lose most of your phase resolution. Think about the amount of information in the stream.
Originally posted by soongsc [snip]Now since you only have 16 bits, you really need higer bit resolution or some sort of analog filter to smooth the discrete data into continuous wave. I wonder if sound cards do this kind of processing or not, or whether it's done in the software. [/B]
Bernhard said:So how good work the mostly unfiltered TDA1543 non-os dac ?
Bernhard said:If you have 2 samples @ 20kHz you have 20 samples @ 2 kHz and you already can see the stairs on a scope.