The -90db signal, with a dithered source, would look more like a PWM
square wave until you put it through the high frequency bandpass filters
necessary for the given DAC's sample rate.
No idea why they print these graphs, they are pretty irrelevant.
mlsstl wrote:
> You're right, -65 dB in virtually any analog format is going to be
> nothing but noise and distortion. 40% distortion would be dang good
> looking in comparison.
Just to clarify, a proper digital signal *at any level* is 100% free of
distortion. It may be have lots of random
Archimago wrote:
>
> So the dude measures distortion levels in a 16-bit format at -65dB. Very
> low level! So he's basically only using the lowest 6-bits! Is that what
> they did? And given that CD players / DACs in 1985 were incapable of
> full 16-bit accuracy, it looks bad with at best 36dB
