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@@ -34,6 +34,9 @@ Also see [Derek Jamison's demonstration](https://www.youtube.com/watch?v=iC5fBGw
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+In the following photo attached a MAX9814 electret microphone module to the flipper zero and used the spectrum
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+analyser functionality, with an FFT window size of 1024 and played a 3kHz sine wave tone from a computer.
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+
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## Processing captures
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@@ -72,3 +75,4 @@ plt.show()
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* STM32 DMA example
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* VREFBUF information - https://community.st.com/s/question/0D53W00001awIlMSAU/enable-and-use-vrefbuf-for-adc-measures
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* Relocating vector table - https://community.nxp.com/t5/i-MX-Processors/Relocate-vector-table-to-ITCM/m-p/1302304
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+* Uses FFT algorithm from - https://www.algorithm-archive.org/contents/cooley_tukey/cooley_tukey.html
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anfractuosity