Images can induce IMD as well. Like this:This is just the sort of thing I need to try and understand this stuff.
I can understand that we need to avoid aliases during the ADC process, because they not only pollute the audible range, but will also cause IMD. When it comes to potential images created during the DAC process, if they only occur *above* Nyquist, does that matter? They will waste a bit of power further down the chain, but will be inaudible anyway. I thought that a proper brick wall filter was essential in the DAC, but am I wrong to think that?
I agree, resampling from 44.1kHz to 96kHz with a proper re-sampler and resampling filters is the way to get better results and usually better sound as well ;). The challenge here is that there is no off-the-shelf ASRC with a stopband that begins at Fs/2. Every single chip I looked at...
Now read another post:
Is 44.1kHz fine as a delivery format and we don't need anything more? Just about the only objection from reasonable people I see is that it's hard to filter content in a DAC with that sample rate... Now, I only have a very superficial understanding of how a (modern) DAC works. From what I've...
Here is an experiment you can try, I mean really download the files and use the software mentioned and try it out, don't just read, otherwise it is not possible to understand how these trade offs are made:
Some of you probably have seen a lot of filter plots like these on DAC datasheets: How about making these things without using specialized software like Matlab, Octave and such? They are not particularly easy to use. So many people just "see" them rather than try to figure out the meaning...
It is also important and beneficial too see measurement data from other sources as well, don't just rely on one or two websites. Here are some examples of third party measurements: