how to finish FFT analysis (used stereo 16-bit of si read.vi )

[bruce lin]

sorry! My question was error.
very think you asked my question.
but i couldn't finish stereo 16-bit fft analysis(fft3.vi). see attach files

[Evan]

Bruce,

I am sorry but I do not understand your question. I have seen the VIs and the screenshots, but I am not sure what you are trying to do. What do you mean by "can't finish" The VIs appear to run. Are you getting an error?

[bruce lin]

I am sorry you do not understand my question,
I want my stereo 16-bit fft analysis frequency spectrum graph(fft3.vi) same as mono 16-bit fft analysis frequency spectrum graph(fft2.vi)-----
in 500Hz, 1300Hz, 4000Hz have three peaks

[alipio]

Hi
I have tried your vis and they run fine. In the stereo one, think you are selecting columm 1 for the two spectrums ( same channel), and one should be 0.

See attached file.
Sorry. Signal was 1000 Hz square
Check the windows mixer settings to see they are correct.

Hope it helps
Alipio.