Does Digital Try Too Hard?


Digital glare. A plague of digital sound playback systems. It seems the best comment a CD player or digital source can get is to sound “analog-like.” I’ve gone to great lengths to battle this in my CD-based 2-channel system but it’s never ending. My father, upon hearing my system for the first time (and at loud volumes), said this: “The treble isn’t offensive to my ears.” What a great compliment.

So what does digital do wrong? The tech specs tell us it’s far superior to vinyl or reel to reel. Does it try too hard? Where digital is trying to capture the micro details of complex passages, analog just “rounds it off” and says “good enough,” and it sounds good enough. Or does digital have some other issue in the chain - noise in the DAC chip, high frequency harmonics, or issues with the anti-aliasing filter? Does it have to do with the power supply?

There are studies that show people prefer the sound of vinyl, even if only by a small margin. That doesn’t quite add up when we consider digital’s dominant technical specifications. On paper, digital should win.

So what’s really going on here? Why doesn’t digital knock the socks off vinyl and why does there appear to be some issue with “digital glare” in digital systems.
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terry9

It follows that some form of interpolation is being used to convert the discrete sample values ... There seem to me to be only two alternatives: (1) stick with a safe linear interpolation, or (2) guess. But with a guess ...

No, there's no interpolation going on here - unless there's an issue reading the disc that requires error correction - and there's no guessing either. Neither is needed because it's a bandwidth limited system.


Quick update: I just modified my CD player to run off a large battery. My CD player takes two voltages: one for the circuitry and one for the motor. It sounds best when the motor is powered by a separate battery instead of both on one battery. This really cleaned up the sound and things are sounding way more analog with a lot less digital glare. Conclusion: Clean power seems to be very important when it comes to converting ones and zeros into an analog signal. (Not that this should come as a surprise to a lot of people)
My own experience is yes the same, clean power for me is almost more important than any electronic upgrading component...
I could see that. It was very surprising to me how much the sound improved by removing the motor from the battery power supply and putting it on a separate power supply. So not only clean power but dedicated power to avoid crosstalk, interference, whatever you want to call it. 
Yes and for this reason my amp and dac ( internal battery powered by a separated from the rest good power supply) are circuit separated one from another, not from the same wall socket for example...