18-Feb-2023, 20:44
@Vivialet : I can see that there may be a benefit in your case since you're combining another DSP function, convolution with the Focus Fidelity filters, with the upscaling.
@markush : caveats accepted.
I repeat: I was not suggesting that Arup was doing anything wrong. He and I have exchanged personal messages in the past about some other issues and I respect his opinions. I was simply wondering why convert PCM to DSD prior to streaming when the first thing the Devialet is going to do is to convert the DSD stream back to PCM. On the surface that amounts to performing 2 digital processing operations which cancel each other out so it seems as if there's no reason to make the initial conversion. I'm guessing that when the DSD stream is converted back to PCM by the Devialet it's not converted back to PCM at the original sampling rate, at least for files which were originally CD quality. I suspect the reconversion to PCM results in a 192/24 stream, or perhaps even a stream at the higher sampling rate at which the Devialet's DAC operates. I was wondering whether Arup is noticing something there which I hadn't noticed.
And, of course, with his system including a 440 Pro whereas mine includes only a 140 Pro, and adding in my 75 year old ears which I suspect have a little more "wear and tear" on them than Arup's do, he may very well be hearing something I won't hear. I asked my question because I'm interested in hearing his reasons for his choice and I asked here rather than in a PM because I think that if I'm interested in hearing his reasons for his choice there may well be others here who might find something interesting in his answer as well.
@markush : caveats accepted.
I repeat: I was not suggesting that Arup was doing anything wrong. He and I have exchanged personal messages in the past about some other issues and I respect his opinions. I was simply wondering why convert PCM to DSD prior to streaming when the first thing the Devialet is going to do is to convert the DSD stream back to PCM. On the surface that amounts to performing 2 digital processing operations which cancel each other out so it seems as if there's no reason to make the initial conversion. I'm guessing that when the DSD stream is converted back to PCM by the Devialet it's not converted back to PCM at the original sampling rate, at least for files which were originally CD quality. I suspect the reconversion to PCM results in a 192/24 stream, or perhaps even a stream at the higher sampling rate at which the Devialet's DAC operates. I was wondering whether Arup is noticing something there which I hadn't noticed.
And, of course, with his system including a 440 Pro whereas mine includes only a 140 Pro, and adding in my 75 year old ears which I suspect have a little more "wear and tear" on them than Arup's do, he may very well be hearing something I won't hear. I asked my question because I'm interested in hearing his reasons for his choice and I asked here rather than in a PM because I think that if I'm interested in hearing his reasons for his choice there may well be others here who might find something interesting in his answer as well.
Roon Nucleus+, Devilalet Expert 140 Pro CI, Focal Sopra 2, PS Audio P12, Keces P8 LPS, Uptone Audio EtherREGEN with optical fibre link to my router, Shunyata Alpha NR and Sigma NR power cables, Shunyata Sigma ethernet cables, Shunyata Alpha V2 speaker cables, Grand Prix Audio Monaco rack, RealTRAPS acoustic treatment.
Brisbane, Qld, Australia
