Hey,
I saw a thread a couple days ago about aliasing in the KPA, so I tried some test signals using a S/PDIF loop. The KPA is running a simulation of my Elmwood Modena. I'm using the latest stable firmware. Everything seems good until you get up to about 8kHz, and then it starts to alias. Here's the input (8.6kHz sine wave):
[Blocked Image: https://dl.dropbox.com/u/45540223/KPA-Input.png]
And the (aliased) output:
[Blocked Image: https://dl.dropbox.com/u/45540223/KPA-Alias.png]
Now, here's the same test signal run through Logic's Amp Designer running some lousy-sounding emulation of a Mesa Rectifier:
[Blocked Image: https://dl.dropbox.com/u/45540223/AmpDesigner-Alias.png]
Also aliasing.
I've been teaching myself DSP lately, so I find aliasing interesting. Is a high-gain amp model so non-linear that its hard to avoid aliasing?