Related to nexys neo pixel ring project

[fpga_123]

Why the concept of fft has been used.. Plz explain.... 

[D@n]

@muku

Can you please tell me which project you are referring to?  A web link might help,

Dan

[fpga_123]

@D@n

 

https://reference.digilentinc.com/learn/programmable-logic/tutorials/nexys-4-ddr-spectral-sources-demo/start

[jpeyron]

Hi @muku,

The Fast Fourier Transform (FFT) resolves a time waveform into its sinusoidal components. The FFT takes a block of time-domain data and returns the frequency spectrum of the data. The FFT is a digital implementation of the Fourier transform. Thus, the FFT does not yield a continuous spectrum. Instead, the FFT returns a discrete spectrum, in which the frequency content of the waveform is resolved into a finite number of frequency lines, or bins. This allows us to display sound from the mic on the monitor and through the LED strip as shown in the video at the bottom of this tutorial you linked above.

cheers,

Jon

[fpga_123]

On 8/25/2017 at 11:43 PM, jpeyron said:

Hi @muku,

The Fast Fourier Transform (FFT) resolves a time waveform into its sinusoidal components. The FFT takes a block of time-domain data and returns the frequency spectrum of the data. The FFT is a digital implementation of the Fourier transform. Thus, the FFT does not yield a continuous spectrum. Instead, the FFT returns a discrete spectrum, in which the frequency content of the waveform is resolved into a finite number of frequency lines, or bins. This allows us to display sound from the mic on the monitor and through the LED strip as shown in the video at the bottom of this tutorial you linked above.

cheers,

Jon

thanks a lot ................