It is definitely aliasing, and it's not the fault of the codec. The aliasing is occurring during the initial synthesis.
To show what is going on, I generated a 20kHz sine wave at 44.1kHz sampling...
Type: Posts; User: Drakonite
It is definitely aliasing, and it's not the fault of the codec. The aliasing is occurring during the initial synthesis.
To show what is going on, I generated a 20kHz sine wave at 44.1kHz sampling...
The short answer is yes, the artifacts you are seeing are expected. It's called aliasing.
It appears you are trying to generate a 20kHz sine wave, while the audio board outputs at a 44.1kHz...