Second part of tone detection using TKEO

It’s been almost a year since I put up my last tutorial about tone detection using the Teager Kaiser Energy Operator.  I have finally written something up for part two here.  Life with a young family has been quite busy for me.  If there is enough interest in the TKEO stuff, I may write a part 3 showing a fixed point version (another year from now?).

Let me know if there are any problems with formatting in the code (something that always seems to be a problem). Copying the code is easy.  If you put your mouse pointer over any of the code listings, a number of symbols will be shown at the top right.  One of these will allow the code to be copied to the clipboard.

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