Digital Sound & Music: Concepts, Applications, & Science, Chapter 5, last updated 6/25/2013
Figure 5.35 880 kHz wave sampled at 1000 kHz
For an actual frequency that is above the sampling rate, like 1320 Hz, the calculations are
p is even, so
Thus, a 1320 Hz wave sampled at 1000 Hz aliases to 320 Hz (Figure 5.36).
Figure 5.36 1320 kHz wave sampled at 1000 kHz
For an actual frequency of 1760 Hz, we have
p is odd, so