Pierre Massat escribió:
Wait, so aliasing occurs when the signal is sampled? So if i have this patch :
[adc~] | | | [dac~]
and if the signal already contains frequencies above the Nyquist, i will get aliasing?
Well obviously (or not) a real-world ADC (e.g. a sound card) always includes an analog lowpass filter that cuts off the frequencies above Nyquit before actually digitalizing!!!!
However, when you sample a mathematically generated signal, such as:
[phasor~ 1000] | [dac~]
then no filtering occurs, and aliasing does occur.
More evident:
[osc~ 40000] | [dac~]