NWO is responsible for concert pitch A-440hz, page 28
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reply posted on 5-5-2008 @ 05:05 AM by MastaG
Bobby, great thread! It's simply fantastic! I've been into sound for more than 8 of my almost 21 years, so I'm really fascinated by the subject. WD!

For all you experimenting with pitch shifters and timestretchers the percentage to drop the pitch is to 98.18181818(18)% [432/440*100], that's a change by -1.81818181(81)%.

The change in pitch is very low, and most people will never notice. Also, these manipulations are best heard on electronic music, not your favourite golden oldies due to the fact that computer sound generators generate the A-440 and use it for calibrating to other notes.

I've attached three short sound files of my manipulations to a song by Origin Unknown called "Valley of the Shadows"; basically I'm pretty sure that it was completely written using synths (synthesizers (sp)) based on the A-440Hz margin and not sampled from old records.


File 1: Original version at 440Hz
File 2: Edited version at 432Hz (high quality and high precision, took over 20(!) minutes to process a 1 min 10 sec file)
File 3: A switch from 440Hz to 432Hz at 25 sec, back at 40 sec, and down again at 51 sec. So you can hear the contrast.


After listening to it I felt the 432 version was kinda' 'bent out of place', I don't really like it. Maybe it's because our brains are adjusted and got used to the 440Hz base, or perhaps it's the effect of this particular song, I'll be experimenting with other songs and let you know if I get some results.


P.S.: By the way if you mix both files (1 and 2) and listen to them synchronized you'll hear a Chorus Effect at 8 cycles per second I believe.


Edit to add:

Here's a pretty good Frequency-to-note convertion site:

Cents to Frequency Calculator

So basically, all synths have a TONE OFFSET feature in the settings, which is set in CENTS (100 cents = 1 semitone).
An offset of 8Hz is -31.766653633429414 cents, roughly -32 cents will get your electric pianos as close to the A-432Hz base as possible (i.e. 431.9417763085722Hz). Let's tune 32 cents down

[edit on 5/5/08 by MastaG]


reply posted on 9-5-2008 @ 01:51 PM by dave420
reply to post by Herbal Oli



Judging by the reaction to the tests posted above, I doubt it!


reply posted on 9-5-2008 @ 09:36 PM by Herbal Oli
Originally posted by dave420
reply to
post by Herbal Oli



Judging by the reaction to the tests posted above, I doubt it!


Dave, have you actually played at 432Hz?


reply posted on 11-5-2008 @ 10:59 AM by dAlen
reply to post by SkipShipman



How did your experiment go? Perhaps you could post your results somewhere (youtube or something.) - though it would be nice to have good sound, not sure if youtube is the best route in light of the topic of 'quality music'.

Peace

dAlen


reply posted on 11-5-2008 @ 12:06 PM by MastaG
reply to post by dAlen



dAlen, just tune down each of your machine heads (or pegheads, tuning keys, tuning machines, tuners whatever you call them).
Use digital tuners (for example 'PC software + microphone' are pretty good) to check on your tuning. Pluck the string - watch the frequency you get...

You can find all the frequencies for each note of every octave here:

www.phy.mtu.edu...

simply subtract 8Hz to tune into the A-432Hz base.


Edit to Add:

I'm still trying to calculate the resonating frequencies. The 432Hz frequency doesn't seem to be fundamental frequency. Does anyone know the fundamental frequency of everything around us?

en.wikipedia.org...

[edit on 11/5/08 by MastaG]


reply posted on 12-5-2008 @ 06:10 AM by MastaG
reply to post by Herbal Oli



Oli, 432Hz is thus not the fundamental frequency (natural frequency) of everything around, it's just ONE of the multiple resonating frequencies.

To find the natural frequency we have to divide 432Hz (if indeed it does resonate everything around us) by the largest possible factor to get a WHOLE NUMBER. I've been trying to do that for the past 1 hour. I never paid attention to my Maths teacher...

Here we go...

432/27 = 16Hz
432/54 = 8Hz
432/108 = 4Hz
432/216 = 2Hz

If I have not understood the basics of resonance yet (I paid no attention to my Physics teacher aswell..) :

16Hz will resonate at 432Hz
8Hz will resonate at 432Hz
2Hz will also resonate at 432Hz

What is the natural frequency? 2Hz? 16Hz? 32Hz? or 432Hz?

And here's another tough part: if indeed 432Hz resonates everything around us, then WHAT ARE THE OTHER FREQUENCIES?

If the natural frequency of everything is 2Hz then our music should be played at tones 4Hz, 8Hz, 16Hz, 32Hz, and so on... to be in resonance with "everything"

If the natural frequency of everything is 3Hz, then our music should be played at tonal frequencies of 6Hz, 12Hz, 24Hz, etc...

PLEASE CORRECT ME IF I'M WRONG, I'M SOMEWHAT CONFUSED MYSELF... ..I MIGHT BE TALKING BS but I'm surely doing some technical tests analyzing frequencies with my sinewave generators, mixers and oscilloscopes...

Edit To Add:


Systems with one degree of freedom, such as a mass on a spring, pendulums, balance wheels, and LC tuned circuits have one resonance frequency. Systems with two degrees of freedom, such as coupled pendulums and resonant transformers can have two resonance frequencies. Extended objects that experience resonance due to vibrations inside them are called resonators, such as organ pipes, vibrating strings, quartz crystals, microwave cavities, and laser rods. Since these can be viewed as being made of millions of coupled moving parts (such as atoms), they can have millions of resonance frequencies.


So how can we find these millions of resonance frequencies?

Resonance @ Wikipedia

[edit on 12/5/08 by MastaG]
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