NI myRIO fast fourier transform (FFT) for microphone

[lpfy]

Hello guys,

I want to run a FFT using the A0/I of the NI myRIO 1900 to measure the frequency of the input which is acquired with a microphone. Previously, a myDAQ was used and the FFT worked perfectly but I can't make it work on the myRIO. I am a beginner and have been stuck with this for a while now, that's why I would appreciate your help.

1. Question: Do I need to change the personality of the myRIO to high throughout with n-samples for creating a spectral analysis FFT or is 1-sample sufficient using arrays?

I tried to use the default FPGA personality of the myRIO with the following labview blocks but the input signal frequency is not detected... 

2. Question: If using the 1-sample personality and the labview blocks shown above should give me the desired result... Am I still missing something that is causing the FFT to fail?

Thank you in advance for your help.

[lpfy · Accepted solution]

I found the solution in the mean time.

N-samples were required and here is the working FFT block diagram.

BR lpfy