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Sure, totally agree! I did not confront the logarithmic bandwidth generated by the code, but:
1. the actual bandwidth, and
2. the center frequency of the bar-graph (center bin).

I wish I had...

To illustrate my previous post, in my excel calculations, if you wanted 1/3 octave bands, the bins would be:



1 1 1 1 1 2 2 3 3 4 5 6 8 10 ...

Thanks for the reply!
I am not sure though if you are validating or correcting my comment (that "e" could be determined by the exact octave-fraction necessary to generate the number of bands...

This document explains how to calculate frequency bands LIMITS and CENTER FREQUENCIES.

Looks like your "E" number is the ratio between any two consecutive CENTER or LIMIT frequencies.

If you...