David M. Koenig

Check out

https://sites.google.com/site/practicalcontrol/

for biographical info on the author and technical info on Practical Control Engineering.

Also, for Spectral Analysis of Musical Sounds, look at

https://sites.google.com/site/analysisofsoundsandvibrations/

for

(1) links to about 25 videos on topics related to the book,

(2) Matlab scripts used in the book,

(3) Matlab and Octave scripts that can be used to collect data from a piano.