« Pirates and Meteorology - Dick LaRosa | Main | The Tree Lights - John Dunn, Consultant, Ambertec, P.E., P.C. »

July 26, 2011


John Dunn

This issue is utterly without solution and it puts pianists and violinists are perpetual odds with each other. Violinists like perfect intrervals (perfect fifth ratio of 1.500:1), but pianists are constrainted to tempered intervals.

At one local gathering of the Quartet Society, I have been told, one violinist called out to the sky above: Pythagoras! Where are you when we need you???"

Chris Paul

It used to be that instrument makers in the 17th century actually made keyboards with notes of the same name but slightly different pitches, to be used depending on what other notes were struck at the same time. (What a mess!)

Our trip to the well tempered scale is not well documented historically, but seemed to involve at least one Chinese prince, Western mathematicians, and that musical genius J.S. Bach.

Jacksonville Electrician

Thank you for such a informative blog. Where else could anyone get that kind of information written in such an incite full way? I have a project that I am just now working on, and I have been looking for such info.

peter van der wurff

i intend to filter all the notes, i.e. one signal out of the filter gives me the do and a bit around it, the next signal gives me the re, the next a mi and so forth, so a bit like a speaker box with hi, medium and low speakers, but now much more detailed. where do I get such a filter?

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Your comment could not be posted. Error type:
Your comment has been saved. Comments are moderated and will not appear until approved by the author. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.


Post a comment

Comments are moderated, and will not appear until the author has approved them.

Your Information

(Name and email address are required. Email address will not be displayed with the comment.)


  Learn about our  

 free engineering 

consulting referral 

      service at:


  IEEE Consultant's 

      Network of 

     Long Island


We have over forty 

electrical, electronic, 

mechanical and 

software engineers 

with expertise in more 

than sixty-five categories 

of technology and business. 

All are members of the 

IEEE and adhere to the 

IEEE professional codes 

of ethics. 

No fee is charged for the

referral service. 

Each member is an 

independent consultant 

and negotiates his/her 

own consulting agreement.


Editor: Jerry Brown


John Dunn

Marty Kanner

Murray Kleiner

Dick LaRosa

David Pinkowitz

Carl Schwab

Gerry Bodner

Larry Rachman


Unless otherwise noted, 

reprinting or republication 

of anarticle on this blog is 

authorized by crediting the 

author and prominently 

displaying the following 

sentence at the beginning 

or end of the article,

including the hyperlink to

IEEE Consultant's Network 

of Long Island

"This report is republished 

with permission of IEEE 

Consultant's Network of 

Long Island"



Blog powered by Typepad

Enter your email address:

Delivered by FeedBurner