Howtosignalprocessing
- How do you choose a sampling rate based on frequency?
- How do I choose audio sample rate?
- Why do we sample at 44.1 kHz?
How do you choose a sampling rate based on frequency?
The Nyquist theorem – choosing the right sample rate
The Nyquist theorem is part of the fundamentals of signal conditioning. Based on that, you must choose the sample rate at least twice as high as the maximum frequency in the signal.
How do I choose audio sample rate?
Sample rate directly corresponds to the highest frequency a digital system can record. The Nyquist Theorem states that the sample rate must be twice as high as the frequency you want to record. So at 44.1 kHz, the highest recordable frequency is 22,050 Hz. This is already well above human hearing!
Why do we sample at 44.1 kHz?
In digital audio, 44,100 Hz (alternately represented as 44.1 kHz) is a common sampling frequency. Analog audio is often recorded by sampling it 44,100 times per second, and then these samples are used to reconstruct the audio signal when playing it back.
