Quote Originally Posted by Wombat View Post
The next digital filter inside the DAC must change that impulse again. Most likely it just ads some pre-ringing and more.
One of the advantages of upsampling is that the next filtering can be done at frequencies well beyond human hearing.

Any graph that illustrates the real signal at the analog exit would be nice.
The Meridian 808.2 analogue output is probably the best example that I know of. It's nice an clean, and with no pre-ringing.



Besides that i once upsampled some songs offline and played them. If it changed anything then it was wose on my Transporter. Of cause that wasn´t with that much effort when i tried.
I think it would be quite easy to produce something worse without careful consideration of the algorithm.