MEASUREMENTS: PCM to DSD Upsampling Effects (JRiver MC19 Beta)
Monte Verdi
MEASUREMENTS: PCM to DSD Upsampling Effects (JRiver MC19 Beta).
http://archimago.blogspot.ca/2013/09/measurements-pcm-to-dsd-upsampling.html
Ramon
Chris Woodward
This reminiscent of tests of tubes vs. solid state, in that those comparisons always leave me wondering whether they're measuring the right things, and indeed, whether the "right things" are knowable or measureable. The author seems to believe that distortion is the reason that DSD upsampled material sounds "better", much like people claim that tubes sound "better" because of distortion. But do the tests described in this article adequately factor the vastly increased sampling rate of DSD, and how the human brain interprets that information? I suppose that one could also do testing of vinyl playback and conclude that it's distortion that makes vinyl sound good, disregarding the nature of an analog signal and how its perceived by the listener.
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Monte Verdi
2. Noise shaping pushes the DSD quantization noise into the ultrasonic frequencies as expected. In DSD64 it rises above the noise floor almost right at 20kHz, and in DSD128 it starts around 40kHz. (I vote for pushing it up to 40kHz as less likely to cause distortion through the amp & speakers.)
Also,
" Even though the noise is ultrasonic in nature as measured off the DAC, nonlinearities in the playback system like your headphones and speakers (perhaps certain amps as well) could create audible intermodulation. Maybe for certain music, this could be especially beneficial. "