Android Question I need to determine the frequency of a chunk recorded audio

[Rattigan_Roger]

I need to record a second or so of audio and analyze it to determine the frequency.
any ideas"

 

[Stulish]

Not sure if the FFT Lib will help ??

 

[Rattigan_Roger]

Thanks, I'm looking at it now.
My FFT days are long behind me, I'm hoping there is some way to do it easily
nut the thread you referenced is very instructive concerning how to handle audio files.
Thanks again.

 

[KitCarlson]

Since frequency is 1/Period. If you know the sampling rate, it is possible to then measure the time between zero crossings. It may likely involve simple interpolation, since the samples may not precisely line up with zero crossings.

 

[Rattigan_Roger]

I like it.
Now, if I could only figure out how to move the recorded sound file into an array where I could find the zero crossings.

 

[KitCarlson]

I think there are Android applications that record. Perhaps search for apps at Google Play or sound recorder as a project or tutorial somewhere on this site.

I have also found great information in the Beginners Guide and User Guide in the Documentation of this site.