Recording spectograph information

Postby fivesenses » Mon Nov 21, 2016 5:48 am

After doing some Googling, I can just about understand how to use the spectograph to figure out my own readings, but the app only exports to csv text files. Since I can't monitor myself meditating, is there a way to have it record and save data as a spectograph? Or convert the csv to a spectograph image?
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Re: Recording spectograph information

Postby James » Tue Nov 22, 2016 2:06 pm

There is currently no way to record directly to a spectrogram. However all the data in the spectrogram is interpreted data created from the RAW data, which is recorded. As such, you can re-create a spectrogram from a RAW data recording. To do this, perform an FFT with a hamming window function.
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Re: Recording spectograph information

Postby fivesenses » Fri Nov 25, 2016 9:57 am

Sorry, I don't know what an FFT or a hamming window function is. Can you tell me what I need to do to convert the RAW data into a spectogram?
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Re: Recording spectograph information

Postby James » Mon Nov 28, 2016 8:27 am

Wikipedia has a very good article on Fast Fourier Transforms (FFT). If you've not heard of FFT then it will likely be a steep learning curve for you. I would recommend using something like processing.org to play with the data.
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