Recording spectograph information

Post Reply
fivesenses
Posts: 4
Joined: Sat Nov 19, 2016 7:49 am

Recording spectograph information

Post by fivesenses »

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?
User avatar
James
Site Admin
Posts: 1063
Joined: Wed Jan 02, 2013 9:06 pm

Re: Recording spectograph information

Post by James »

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.
fivesenses
Posts: 4
Joined: Sat Nov 19, 2016 7:49 am

Re: Recording spectograph information

Post by fivesenses »

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?
User avatar
James
Site Admin
Posts: 1063
Joined: Wed Jan 02, 2013 9:06 pm

Re: Recording spectograph information

Post by James »

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.
Post Reply