Quote:
Originally Posted by john1979
So for older Amigas the answer is no, sound above 4.5khz is cut off,
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Not quite.
The fixed low pass filter's cutoff isn't very steep at all so plenty of energy above 5KHz is still passed.
I think even at a frequency of 18KHz about 20% of the signal still gets through. The attenuation with increasing frequency is very gradual.