Music Note Frequency Calculator With Cent Adjustment

A colleague posed a very interesting question:
“I am looking for any music/music math wizard help me figure this out. If I am moving the pitch of a song up by 50 cents (a quarter step?) What frequency is A instead of 440?”

Sounded like the kind of math challenge I like:

Screen Shot 2015-02-06 at 8.59.14 AM

Screen Shot 2015-02-06 at 8.59.29 AM

The answer is 452.893Hz
Screen Shot 2015-02-06 at 8.59.38 AM

 

 


To test and confirm that it’s calculating properly, this is up 100 cents making G# 440
Screen Shot 2015-02-06 at 8.48.14 AM
This is down 100 cents making A# 440
Screen Shot 2015-02-06 at 8.48.29 AM

Here is a link to the excel file

RLC calculator for components in series

I’ve been calculating a lot of components in series lately for an ECR255 class. I’ve also had to graph them on impedance diagrams and a power triangle.

In an effort to better understand the math I made a calculator for myself. Here is it for you to use and enjoy. If you see any problems please let me know. It was designed in excel 2011 for mac… there WILL be compatibility issues and I hope they’re minor.

How it works:

You can fill int the info you have in the orange boxes. Once the boxes are filled in the calculator should fill in the rest.

If you need to modify anything else, it’s all dependant on the orange boxes. I suggest a goal seek by modifying and orange cell.

Screen Shot 2014-07-06 at 9.36.44 PM

 

 

 

Screen Shot 2014-07-06 at 9.38.09 PM

Screen Shot 2014-07-06 at 9.48.54 PMScreen Shot 2014-07-06 at 9.49.10 PM

 

Screen Shot 2014-07-06 at 9.49.00 PM

Screen Shot 2014-07-06 at 9.49.16 PM

schadow switch mounting information

In the 70’s and into the 90’s WBS used a Schadow switch in almost every product they built. Different buttons required different offsets so “GOLDEN RULES” of design were made up so each engineer was on the same page. I found two of those pages the other day and was fascinated. These drawings are both done by hand and are admirable.

2014-06-27 18.41.15

2014-06-27 18.40.52

Audiophiles are…

“Audiophiles are the homeopathic healers of the electrical engineering world”

http://www.ebay.com/itm/XLO-Purple-Rush-HIFI-US-AC-Audiophile-Power-cable-2M-original-wooden-box-US-ver-/191184667146?pt=US_Video_Cables_Adapters&hash=item2c837e820a
$_12

$_57

$_12-1
if your curious about the patents

https://www.google.com/patents/US6969805?dq=6969805&hl=en&sa=X&ei=Out9U9upGPOl8gGBzoG4CA&ved=0CDcQ6AEwAA

https://www.google.com/patents/US7034229?dq=7034229&hl=en&sa=X&ei=rOt9U6e2GoHd8AH9pYHYBQ&ved=0CDcQ6AEwAA

https://www.google.com/patents/US7476808?dq=7476808&hl=en&sa=X&ei=z-t9U9PHGcSZ8QGW7IDwAQ&ved=0CD4Q6AEwAQ

Wednesday night TV

Check out Jörg Wuttke, Understanding Microphones

Jörg Wuttke was born in Berlin in 1942. He studied electronics and telecommunications at Karlsruhe University, specializing in acoustics, and was teaching assistant to professor Günther Kurtze, the inventor of the shotgun microphone. He joined Schoeps GmbH as a research engineer in 1970, became its chief engineer in 1972, and is now its technical director.
Mr. Wuttke has been an active member of the Audio Engineering Society for many years, including publishing in the AES Journal and presenting papers and chairing workshops at conventions. In1993 he was awarded an AES Fellowship. Since 1972, he has been a member of the DIN standards committee on microphones and headphones. He maintains an avid interest in listening to music and recording live concerts.