# Isolate a single bin of an FFT

This example shows how to isolate a single FFT bin, as opposed to displaying the entire spectrum. The example uses **fft~** instead of **fftin~**, but the principle is the same.

The right outlet of **fft~** outputs the bin index. When that index matches the number selected in the **number** box, **sah~** will be triggered and will output the magnitude of that frequency bin.

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