Originally Posted by 3phase
the video dont bust any myths .., when todays producers know crap about digital audio i call that sad. But beeing unliteral in audio technology cant be called a myth..
The guy explains some basic facts but that on a level way below on what a producer should know allready. If that not the case.. ok.. good for you that some gaps got filled but dont do the usual beginners mistake to learn something from a youtube video and straight jump into the the teachers position and start than to spread all wrong conclusions as facts.
Thats actually producing audio myths.
I can openly admit that I wasn't aware that you can reproduce the sine wave accurately
which is near nyquist frequency, especially when it's cycles are not
perfectly aligned with the sample points (sub sample accuracy near nyquist, etc.). I knew that the DACs were doing some kind of interpolation between the samples, but from what I saw in the video, the interpolation was much more advanced than I had thought. It's able to recreate a perfect sine from a serious looking mess of samples. This probably means that the interpolation method is using several samples as coefficients or something.
Since you seem to know how it's done / how it actually works, would you mind sharing your knowledge on this topic with us?
nobody ever questioned that a niquist filter makes perfect sinewaves out of digital data..
I did, under certain conditions. See above.
Now that I read your response again, why did you use the words "nyquist filter" in the context of DAC?
Its other issues that came into focus during that ongoing discussion like mirro ferquencys on the samplerate or phase distortion thru the niquist filter that explained the shortcomings of cd audio and a highend digital format was established with 96K24 bit with good reasons.
Mirror frequencies aren't a problem. The analog signals are always band limited before they hit the ADC.
Also phase distortions probably should be overcome using phase linear filters? (My DSP knowledge is very limited but I think this should be the case here.)