Slowing A Track In Izotope

[scoostraw]

Hi. I am new here, and looked but can't seem to find how to do this simple task.

I have a track that was simply mastered too fast. I want to slow it down - including the pitch - just as if I was slowing a tape deck during playback.

How do I do this? I am confused by the "Tim & Pitch", "Variable Pitch", and "Variable Time" options.

Many thanks!

Izotope RX8 Advanced - MAC

[James Perrett]

If it is any consolation, I can't see how to do it in RX either. I do it in Reaper which allows you to either set a global playback rate or a playback rate for each item. Just make sure that you have Preserve Pitch un-ticked when you use it.

[scoostraw]

Wow thanks James.

I admit it's mind-blowing in a way that there is no way to do this in Izotope.

[scoostraw]

I just noticed that Reaper is $225 for a license.

Is there another way to do this that you are aware of? I only need this one function and I am hesitant to spend that kind of money for something that I would be using probably only once.

[James Perrett]

You must be making quite a bit of money from music if you qualify for the $225 license! Most users can license Reaper for only $60. However, Reaper is free to try and the only difference between the licensed and unlicensed version is a nag screen at the start. The unlicensed version never runs out - although most people that I know who have tried it seem to buy a license in the end.

[scoostraw]

Ahh.. ok cool I will give it a try.

Thank you!

[RichardT]

You can do it with IZotope in a very crude way.

(Maybe those time and pitch options will also work, but I’ve never used them. According to the documentation, they should do want you want).

Anyway, the crude method. Assuming your file is at 44.1KHz convert it to 48KHz using resample. Then use resample again, but choose the option that just updates the sample rate recorded in the file metadata and set it to 44.1KHz.

This will take the song down by about a semitone and slow it down too.

Repeat to taste!

[scoostraw]

Thanks guys for all the help. I managed to correct things in Reaper.

BTW yes it is $60. For some reason google was showing me a high license cost. I am nobody. I am "just a guy".

[beej65]

You can do it with IZotope in a very crude way.

(Maybe those time and pitch options will also work, but I’ve never used them. According to the documentation, they should do want you want).

Anyway, the crude method. Assuming your file is at 44.1KHz convert it to 48KHz using resample. Then use resample again, but choose the option that just updates the sample rate recorded in the file metadata and set it to 44.1KHz.

This will take the song down by about a semitone and slow it down too.

Repeat to taste!

Forgive my hijacking of this thread, because of the adjoining thread re: fixing poor audio - Will some form of resampling, per Richard above, help an audio track which has much distortion because of a mismatch between sample rates of, say, OBS and Adobe Soundboard? This is just spoken word recording, only happened once after (a) software update, all seems normal now but I have one recording which I'd like to 'repair'...

[RichardT]

Unfortunately re-sampling won’t remove the distortion.

[James Perrett]

Will some form of resampling, per Richard above, help an audio track which has much distortion because of a mismatch between sample rates of, say, OBS and Adobe Soundboard?

Richard's solution will only help where you need to change the sample rate of an otherwise good recording.

If the recording has a continual string of clicks due to the sample rate mismatch then you may need to use something like RX's de-crackle but the best solution is totally dependent on how bad the problem is. Can you put up a short sample somewhere that we can hear it?

[beej65]

Yes, here it is, and it literally is terrible, apologies in advance...
https://www.dropbox.com/scl/fi/fsstcn2x ... 629rq&dl=0
I just want to be sure this still relative amateur isn't missing some "easy" fix that I could be missing.

[sonics]

To the OP

I admit it's mind-blowing in a way that there is no way to do this in Izotope.

Of course there is!

Select your audio. Use the Variable Pitch module to set your slow-down amount using the nodes. You can make the change consistent, or have it changing over time; anything you want. (Use the compare function to preview your selection if you need to.) Use Ctrl click (in Windows) to fine tune the values. Adjustments can be as small as a 1 cent pitch change.
Make sure the "Preserve time" option is NOT checked.
That's it...

I'm using RX 10 Standard, BTW. I'm pretty sure this functionality has been in RX for a very long time.

[James Perrett]

To the OP

I admit it's mind-blowing in a way that there is no way to do this in Izotope.

Of course there is!

Are you sure?

I'm just trying it right now and it is taking a very long time which implies that it must be doing something far more than a simple pitch control.

Currently still at only 30% on a 4 minute song with 4 minutes to go.

Edit - it seemed to get there in the end but it took as long to do a 4 minute song in RX as Reaper would take for a few hours worth of material.

[Hugh Robjohns]

Oh wow! You've got regular substantial dropouts, high rate clock mismatch clicks, and aliasing all in the one track. I dont think that is salvageable, I'm afraid.

[sonics]

Are you sure?

I'm just trying it right now and it is taking a very long time which implies that it must be doing something far more than a simple pitch control.

That doesn't sound right. Are your settings on the defaults? Are your start and end nodes equal? I just pitched a whole 48kHz track down a semitone and it took 2 seconds on my old i7 desktop.

With the "Preserve time" option off it uses a resampling algorithm, which should be fast.