Fun and informative discussion. Thanks to all.
Agree! Thanks to everybody!
Fun and informative discussion. Thanks to all.
Both PDM and PCM are ways to depict an analog waveform in a binary coded form. It's like writing down a recipe for lasagne in both Spanish and German, and arguing that italian is more "natural" because Spain is closer to Italy
But Julf, where is the coding in PWD?
Spain is not even closer to Italy than Germany
Pulse density modulation is just that, modulation - a way to convey a signal (in this case analog) over a different media (in this case digital). You have converted an analog signal into digital (how else could you transmit it over a network or store it on a hard disk?) and back into analog. It is just that in PDM most of the hard work is done at the analog-to-digital stage, and less of it in the digital-to-analog.
Both PDM and PCM are encoding/modulation methods. One is easier to convert into analog, the other is easier to process.
Witness an analogy being stretched to snapping point...
So if PWD is ENCODED, why can we get music when we connect the stream directly to a speaker? That is what I keep going back to. Cant get away from that.
You should have said: Culturally man, culturally!
So if PWD is ENCODED, why can we get music when we connect the stream directly to a speaker? That is what I keep going back to. Cant get away from that.
Why would the noise shaping be any more aggressive for DSD than other 1-bit, or even multibit, delta-sigma converters?
What dither challenge? Dither comes for "free" in most delta-sigma loops, circuit noise... Often encoding on the ADC (source) side.
I am alluding to relate to the papers done by Lipschitz and Vanderkooy,
I am happy if we get both formats tbh, that way we have a choice on the sound preference for any album released.
The fundamental problem for PCM is there are no good native PCM A/D converters available today, outside of the few remaining Pacific Microsonics PM1 and PM2, and virtually no labels using those that are available. The available ADC's today are all multi or single bit PDM, that must be decimate filtered from their sampling rate to whatever PCM rate is used for the recording. That filtering process is quite discernible. IMO, that effect is far greater than the perceived problems often associated with DSD.
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