Boogie Bones

RE: Boogie Bones

BigG — Wed, 12 Feb 2020 16:18:32 GMT

I've briefly turned my attention to the RSL10-SENSE board as I had made comment on another post some time back that I would look at an FFT example for this dev board.

This made me stumble across this YouTube video which I wanted to post here as it provides a nice visual demo of what the windowing function does. It's a pretty cool demo.

I believe that this demo uses the ARM CMSIS-DSP Software Library which includes various transforms, such as real and complex FFT functions.

https://www.youtube.com/watch?v=Nn7DweR--Po

CMSIS reference: https://arm-software.github.io/CMSIS_5/General/html/index.html

I found the project details related to that video here: https://community.nxp.com/docs/DOC-100207

RE: Boogie Bones

jc2048 — Tue, 11 Feb 2020 22:42:26 GMT

Fun project. It was also interesting learning about FFT on an Arduino.

Wouldn't the weighting-window code be more efficient if the multiplier values were all computed once at the start and then reused each time [always assuming that the processor had enough memory to store them], or have I misunderstood what it's doing?

RE: Boogie Bones

dixonselvan — Tue, 11 Feb 2020 13:26:22 GMT

Nice project [mention:18d073d7306a4a8694ee59c07b9ecc65:e9ed411860ed4f2ba0265705b8793d05] I thoroughly enjoyed going through your blog and learning some new information at the same time.

Finally your skeleton buddy has come to life!

RE: Boogie Bones

newbie101 — Mon, 10 Feb 2020 18:40:42 GMT

Great project! I am also interested in FFT and your description of the FFT code really helped out. I especially liked the video you linked "to see how a Fourier Transform works visually". It was a very good explanation of how the equations work. I am now encouraged to try out a FFT project with an ESP32.

One question: Why did you choose the FFT_WIN_TYP_BLACKMAN_HARRIS vs the FFT_WIN_TYP_HAMMING windowing in the final project?

RE: Boogie Bones

dubbie — Mon, 10 Feb 2020 10:05:39 GMT

This is a great project that is well executed and well documented. I had been planning to do something similar but it now looks like I will have to think of something different, or I might see if I can adapt your code instead!

Dubbie

RE: Boogie Bones

shabaz — Sun, 09 Feb 2020 22:56:39 GMT

Fantastic project! And really well documented : )

**goes onto google to search for a DJ skeleton to make something similar**

RE: Boogie Bones

three-phase — Sun, 09 Feb 2020 21:29:33 GMT

A great project and very well explained within the blog.

Kind regards