emergency! 44.1khz to 48khz

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tenkas

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I believe I did a recording at 48khz and the I accidently put it back to 44.1khz which fucked up the sampling rate and dropped pitch, not even a semi-tone.

Is it possible to get the 48khz pitch (normal tuning) back or am I stuck???

The client had to walk out cause I was loosing my hair over that stuff, if anyone can help, I would strongly appreciate!


Thanks
 
Hi,
I am using sonar and there seems to be no way of putting it back to 48khz (to resample a project..)
 
the big problem is restoring pitch... I am able to export files in 48khz and open a new project in 48khz but the pitch will stay too low... It wont go back to the original pitch...
 
Create a new project, and make it a 48KHz project. Import those audio tracks to it and see what happens.
 
I did create a new project, import the files, after converting them in 48khz and before converting them, and still I get the same pitch.

Maybe someone who knows the relation between pitch and sampling rate could help out determine the exact amount of pitch shifting I would need to go back, or if anyone knows how to convert 44.1khz in 48khz while creating a pitch shift, that would be great!

Again, thanks a lot for helping me out!
 
how were you able to change the sample rate of the files in the first place?
 
I have absolutely no idea, because I believe I mistakenly switched the sampling rate to 48khz and the back to 44.1khz... It is very weird and today is the second day of the recording session and BANG, in my face, this problem occurs and I am stuck with a downtuned song.

I have absolutely no idea how it went to 48khz and how it went back to 44.1khz, one thing is that when I was able to convert a 44.1 to 48 and it did the opposite of what the project has become. 44.1 to 48 raises the pitch almost a semitone so I assume 48 to 44.1 will do the invert.
 
Well, what it sounds like is that you had some hardware working differently from the software. Probably your only hope is to replicate the problem and continue on that way until the project is over.
 
how many tracks is it??? if you could send them to me, i could change them back to 48khz and send them back....its a simple fix in Adobe Audition...
 
Hi ThaJeremy,
I have tried in cubase and in sonar, but it is impossible to restore the pitch. Does adobe audition restores the pitch? Because I can convert 44.1 to 48 in sonar and cubase, but I am unable to get the pitch back up.

A test you could do is use a single note guitar or piano in a wav file, 44.1khz and try converting to 48khz. If the pitch raises, that means adobe audition is doing something that would be good for me.

If you have time, come back to me with the results, I am interrested.

There are many files (they are 24bit wav files... probably 12)
 
What I am looking for is the amount of pitch shift that occurs while downsampling 48khz to 44.1

I know it is a little less then a semitone, but I do not have the exact values. I have a pitch shift VST that I could use to bring the tracks back to pitch if I get the formula.

Would that be the easiest thing to do?
 
tenkas said:
What I am looking for is the amount of pitch shift that occurs while downsampling 48khz to 44.1

I know it is a little less then a semitone, but I do not have the exact values. I have a pitch shift VST that I could use to bring the tracks back to pitch if I get the formula.

Would that be the easiest thing to do?
Click to expand...

Actually I think it's a little more, try 102.7 cents. Or if I did that backwards, 97.3 cents. One of those should be correct.
 
In Cubase atleast, when you change the projects sample rate,it gives you the option to convert the audio files or not. It sounds like when you converted them once, you changed the sample rate, and in the other conversion you did not. Does that make sense? I have opened PMC files in a project with the wrong rate, and they sounded off pitch, but I just changed the projects sample rate, and chose NOT to convert the files. You should still be able to do this now......
 
Create a new song then import the files in from the disc you backed them up to right after you recorded them.


You did back them up, right?
 
Thanks a lot guys, I will try a few things you have mentionned here, and I will come back to you. I am not at the studio anymore, so thank sa lot!
 
sounds like you time-stamped them wrong. Like turningit inside out...Sucks.




not sure how you got there...It takes a little time for me to change each file. Not sure how you did that so fast.

Did you try a reboot? What interface do you use? when playing the new session did the interface clock match the sessions? because that will screw up pitch...Even if the files are ok.
 
Hi Faderjockey,
I used sonar for the tracking and I believe that the hardware I was using was set to 48khz (for a mysterious reason) while the interface was 44.1khz

For some reason, while I was recording, everything was fine, but after a few listenings, I realised everything has been shifted down. Right now, all the files in my project are 44.1khz but sound flat.

I am not at the studio right now so I can't try anything, but I will try it tomorrow night when I get back there.


I have a question for mshilarious : what is 102.7 cents??? (for the pitch shifting... is it in percent??)
 
tenkas said:
I believe that the hardware I was using was set to 48khz (for a mysterious reason) while the interface was 44.1khz

For some reason, while I was recording, everything was fine, but after a few listenings, I realised everything has been shifted down. Right now, all the files in my project are 44.1khz but sound flat.
Click to expand...

From what I gather from the above. You are playing 48khz files at 44.1. Just change the project to 48khz, and DO NOT convert the audio files. Piece O' Cake in cubase. (done it a million times) :D
 
I've done this before. The easiest thing for me is to do a time stretch/compression and just do 44.1/48 as the ratio, it should give you the option of holding the pitch, or shifting the pitch as well. Let it shift the pitch. Voila, done.
I tried to figure out pitch once too, it's a lot of exp and log shit. I can try again, if you like, but I think the final outcome was somewhere in the neighborhood of 1 1/2 semitones. But if you do it that way, the song will still be slower than it originally was. Good luck.

EDIT: The formula is FreqRatio = (2^(1/12))^semitones
We know FreqRatio= 48/44.1
and we want to know how many semitones so....

Log(FreqRatio)= semitones * (Log(2^(1/12)))

Semitones = Log(FreqRatio)/Log(2^(1/12))
Semitones = Log(48/44.1)/Log(2^(1/12))
Semitones = 1.467

So you need to shift up 1.467 semitones
 
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