Aliasing occurs when you try to sample frequences above half your sampling rate. This is the famous Nyquist theorem. This might help you understand why this can

Aliasing occurs when you try to sample frequences above half your sampling rate. This is the famous Nyquist theorem. This might help you understand why this can happen in naively implemented digital oscillators: http://www.martin-finke.de/blog/articles/audio-plugins-018-polyblep-oscillator/ http://www.martin-finke.de/blog/articles/audio-plugins-018-p...