How good's your hearing

George is stove-piped in on technical challenges associated with Class D for some reason. Don’t know what is the agenda. Maybe its similar to feeling resentment towards a beautiful girl that you really like but jilted you in some way? Who knows. Contradictory findings of others do not seem to matter to him. As if that is the only audio technology that still has unique challenges, especially when it comes to making good sound practically affordable to more.


To each their own.  Definitely a bad look though.

Marklings
Having said that the vast majority of readers of this forum would not be able to hear anything above say 12 / 13 K Hertz. So any discussion about 100k etc is snake oil.

interesting comment.

now from here...

https://www.musical-u.com/learn/percussion-frequencies-part-2-cymbals/

Typical hi-hats are usually between 300-3000 Hz dominant frequencies, and can extend up to 10-17k Hz for crispness, “air” and sparkle.

A worthy note incidentally, is that many audio engineers insist that even though one cannot conceivably hear beyond 20k, one can feel beyond 20k, which is why they are adamant about capturing ALL the recorded frequencies (especially metallic percussion). They feel that one can sense those “inaudible” frequencies, thus making the recording richer, and more open sounding.

Take the high frequency test

https://www.youtube.com/watch?v=sZHWY1KBHwc

ct0517,

Interesting! I took the test at a modest level thru my pc. I couldn't hear the 8000hz, but could clearly hear the 10,000 and 14,000hz tones. WTF.

a common Class-D complaint, as they have output filters to rid the switching noise that create phase shifts down to 3-5khz.

Probably true of a subwoofer amp, but not any that are meant to run full range.


Typical filters on a class D are 12db; if an 80KHz filter, this limits phase shift to well above the audio passband; of course dependent of the Q of the filter! Essentially though the statement quoted above is false.