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Wrong frequency?

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Postby ezza » Tue Apr 14, 2015 6:47 pm

Im analysing some samples i took from synths and whetever note i play the frequency most apparent in the spectrum analysis always seems to be the 1st overtone or 2nd harmonic... anyone know why that is?

so if i play c1 which should be 32.7hz the highest peaking frequency on the graph is actually 65.4hz (c2) :?

am i being really stupid and missing something obvious lol. im going crazy ive been working for like 2 days straight :u:
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Postby mks » Tue Apr 14, 2015 8:26 pm

That will change depending on the waveform you use. The spectral analysis of a trumpet will be much different than that of a cello. They will all produce different overtones. Those overtones/harmonics are what define the timbre of an instrument. Sorry I can't answer your specific question.
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Postby ezza » Tue Apr 14, 2015 8:52 pm

But surely the fundamental frequency should always be the loudest?
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Postby _Agu_ » Tue Apr 14, 2015 9:46 pm

Does it happen with waveforms that certainly do have fundamental being louder than other harmonics (saw waves for example)? Also, what analyzer are you using?
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Postby VirtualMark » Tue Apr 14, 2015 9:56 pm

ezza wrote:But surely the fundamental frequency should always be the loudest?


Maybe not. It's the harmonics that give each instrument it's unique sound.
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Postby ezza » Tue Apr 14, 2015 9:57 pm

_Agu_ wrote:Does it happen with waveforms that certainly do have fundamental being louder than other harmonics (saw waves for example)? Also, what analyzer are you using?


Yeah it does

I've analysised Saw, Square and Triangle waves from each synth. And for all of them it always seem to show it as an octave up :?

Im using the spectrogram in Amadeus pro to analyse them
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Postby VirtualMark » Tue Apr 14, 2015 10:04 pm

Have you tried just a sine wave?
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Postby ezza » Tue Apr 14, 2015 10:29 pm

ok i think im just being a fucking retrard

if you play c1 on the logic keyboard and look at the multimeter the frequency IS 65.4hz so thats the same as what amadeus is showing

but on the interweb it sais c1 is 32.7hz http://www.seventhstring.com/resources/ ... ncies.html http://www.phy.mtu.edu/~suits/notefreqs.html

im so confused. i fucking hate music technology. this course cant end soon enough. never again :corncry: :corncry: :corncry: :corncry: :corncry: :corncry: :corncry:

now my dissertation is fucking useless cus why the fuck would i record analog gear at c2. you'd obviously want a lower frequency tone to get all its goodness :u: :u:
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Postby fragments » Wed Apr 15, 2015 12:05 am

Maybe I'm missing something...but if the original sample isn't a C1 playing it at C1 is relative...right? If you record a C4 sample from a synth then play it in Logic's sampler at C1 that isn't necessarily really C1 right?

Lol...I'm lost as hell man, sorry.
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Postby ezza » Wed Apr 15, 2015 12:07 am

yeah same

im just gonna cri and get drunk

fuck you c1
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Postby fragments » Wed Apr 15, 2015 12:56 am

Spoken like a true artist! ; p
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Postby mks » Wed Apr 15, 2015 5:21 am

fragments wrote:Maybe I'm missing something...but if the original sample isn't a C1 playing it at C1 is relative...right? If you record a C4 sample from a synth then play it in Logic's sampler at C1 that isn't necessarily really C1 right?

Lol...I'm lost as hell man, sorry.


This quite possibly may be the issue. If he sampled all of those tones, the keyboard may be playing them at a different octave.
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Postby _Agu_ » Wed Apr 15, 2015 10:19 am

I went to Logic and tried it with ES2, using only single saw wave, and fuck man.. It actually does play the wrong note. Playing C1 = you get C2. Playing C0 = you get C1. Same happened with Klopfgeist (Logic's sine wave generator).
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Postby AxeD » Wed Apr 15, 2015 3:04 pm

Tone generator gave me the correct result and this other dodgy looking Logic synth on saw
did too:

Image

How did you sample the synths?
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Postby ezza » Wed Apr 15, 2015 3:28 pm

they were wolfs and lyeforms synths so they did it for me

but they obviously did the same thing and matched it to logic

it seems for most people ive asked logic is actually an octave out

even though it and all its synths are spose to be tuned to A4 = 440hz :u: :u:
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Postby AxeD » Wed Apr 15, 2015 4:31 pm

In Logic, middle C is c3 instead of c4. Does that have anything to do with it
by any chance? I'm just spitballing here, I'm not that familiar with the software myself.
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Postby fragments » Wed Apr 15, 2015 5:35 pm

mks wrote:
fragments wrote:Maybe I'm missing something...but if the original sample isn't a C1 playing it at C1 is relative...right? If you record a C4 sample from a synth then play it in Logic's sampler at C1 that isn't necessarily really C1 right?

Lol...I'm lost as hell man, sorry.


This quite possibly may be the issue. If he sampled all of those tones, the keyboard may be playing them at a different octave.


OK. I thought that made sense in my head, but I'm like...only just technically minded enough to pretend I know what I'm doing in a studio... :lol:

I mean, even if you hit C1 on Logic's piano roll and send that MIDI out to a synth...does it automatically play C1 on the synth? That assumes both Logic and the synth agree on what C1 is.
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Postby hubb » Wed Apr 15, 2015 5:40 pm

melodyne bros
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Postby hubb » Wed Apr 15, 2015 5:47 pm

ezza wrote:ok i think im just being a fucking retrard

if you play c1 on the logic keyboard and look at the multimeter the frequency IS 65.4hz so thats the same as what amadeus is showing

but on the interweb it sais c1 is 32.7hz http://www.seventhstring.com/resources/ ... ncies.html http://www.phy.mtu.edu/~suits/notefreqs.html

im so confused. i fucking hate music technology. this course cant end soon enough. never again :corncry: :corncry: :corncry: :corncry: :corncry: :corncry: :corncry:

now my dissertation is fucking useless cus why the fuck would i record analog gear at c2. you'd obviously want a lower frequency tone to get all its goodness :u: :u:


Art schools are useless, most of the industry is monged out and the couses that are made to help out the thing being an industry in like the understanding of fitting people for jobs are more detrimental to the creativity than helpful.

This sucks ofcourse, but also explains why kids on drugs and pirated software are the ones that matter in this whole sphere - which is kind of beautiful.
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Postby _ronzlo_ » Thu Apr 16, 2015 5:04 am

Google "Fletcher Munson curve".

Psychoacoustics is some crazy shit. I would suspect that the hardware might be biased by design.
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