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The mathematician, Harry Nyquist, proved conclusively that accurate reproduction of any sound, no matter how complicated, required a sampling rate no higher than twice as high as the highest frequency that could be heard (NYQUIST LIMIT). This means that high fidelity requires a sampling rate of only 30 kHz and even the best of human ears needs only 40 kHz. CD’s sample at 44.1 kHz. For example, if a sampling rate of 11.025 kHz was used, then the highest frequency that could be accurately represented digitally would by only 5.5125 kHz. The highest note on a piano keyboard is C7 and is 1.9755 kHz (1975.5 Hz). However, the highest note possible with MIDI is G8 which would be 6.272 kHz (6272 Hz). Consequently this pitch if sampled at only 11.025 would not be accurately represented and would actually have a different timbre (waveform). In order to sample a pitch of 6.272 kHz you would need a sampling rate of 6.272 x 2, or 12.544 kHz. SoundEdit 16 only supports three sampling rates for the Macintosh computer hardware. Consequently, you would need to use the sampling rate of 22.050 kHz in order to accurately record (sample) the pitch G8.

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