Sampling Frequency

The sampling frequency determines how many samples per second the sound card transmits and receives. It determines the frequency range of your measurements. Theoretically the frequency range is half the sampling frequency (Nyquist criterion). You may get close to this limit if you correct for the influence of the measurement system.

The supported sampling frequencies is sound card-dependent, most sound cards support 11025, 22050 and 44100 Hz. The newer cards support 48000 Hz, and some new cards 96000 Hz. A sound card that supports 192000 Hz should soon be available.

You may select the sampling frequency from the list of the most usual sampling frequencies, but you can also write the number directly in the window. If the sound card does not support the selected sampling rate, an error message will appear when trying to start a measurement.