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Izotope resampler for amadeus pro12/17/2023 It kicks in at 18K, much higher than I'd expect since 74% of nyquist at 44.1 is 16K approx. What's interesting is that even at 74, the rolloff isn't very severe. At the highest setting of 99.5 it is a "brick wall", whereas at the lowest setting of 74, there is a definite rolloff. I was able to observe the rolloff steepness of the SoX filters at various settings using white noise and zooming in on FabFilter's spectrum analysis between 10 and 22khz. Maybe SoX adjusts the steepness according to the bandwidth? So you have a much higher steepness with a bandwith of 99% than with one of 90%.Ĭan you chose 500,000 samples with you were right. But this could just be my settings, more time will tell which is the better upsampler for me. I find that my setting in iZotope still perform best here - but the SoX isn't nearly as bad in the lows as with the high frequency "smearing/shimmering" I hear. What's interesting though, is that the preringing doesn't seem too bad when I scrutinize the timing of a kick drum - hearing first its batter head which should be followed by its resonate sub bass thump. For instance, Sox seems to present a great image/stage/separation, but comes at the expense of some more ringing that can be heard in the "shimmering" highs on cymbals. I've read some anecdotal things and tend to agree with most of them. Overall, the biggest difference between these is the inability to finely tune the filter steepness in SoX. Admittedly I haven't put near a much time into SoX as I have with iZotope: No LP filter is needed with an EQ plugin since the filter is much steeper it seems. In my case, I'm using FabFilter ProQ2įor SoX, I've chosen the below based solely by ear. In order to avoid aliasing with his settings, you have to use a software plugin to further lowpass the signal. To kick things off, I'm using extreme settings for iZotope as shown below. My experience comes from these software upsamplers as they are implemented in Audirvana Plus 3.2 - But I don't think there's anything keeping others with different players from chiming in here. I wanted to start a topic that focuses on the parameters of these two upsamplers in A+ and perhaps even get some objective measurements of Fourier transforms (impulse response graphs) from those people who can capture them.
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