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I have an audio track downloaded from YouTube that contain what I call "gremlins"; unwanted audio artifacts that don't exist in the original YouTube video. I have seen this before and have just lived with it. Now I'm smart enough to at least ask the question if there is a way to remove them without seriously disrupting the audio that I want to keep. In other words, a "cure" that is worse than the "disease" is not a cure.

I'm pretty sure these gremlins are a result of the downloading of the video and may involve the process of converting the video file to an MP3 file.

Here is an image of a section (roughly between 4:14 and 4:17) where a prominent gremlin lives. (I call him grandaddy troll #17 smile ) There is no visual anomaly that I can see at this timescale in the waveform and the gremlin is not described as white noise but rather it sounds more like a ringtone on a phone. From what I've seen over the years each gremlin has a somewhat unique sound profile. And is somewhat faint, so a good pair of ears are needed to hear it; but it's bothersome enough to me.

For any mixing pros out there, have you seen this and have you been able to solve it? There is a ton of EQ capability in Studio One so I'm hoping I already have the required tools.

I don't think I can post the MP3 file because I don't have the copyrights. But I can send it privately.

Thanks for any ideas.

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Why would you convert a video file to mp3 and how? Assuming that you know this is not possible, what are you really doing and how are you converting the audio?


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Yes, we would need to know the steps you are taking and what software and settings you use. I’m assuming you are recording the audio while watching a video.

I’ll pm you my email and you can send the mp3 file.


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Originally Posted By: Mike Halloran
Why would you convert a video file to mp3 and how? Assuming that you know this is not possible, what are you really doing and how are you converting the audio?

Why? So I can operate on the audio in my DAW.
I don't know this is not possible. I know this is possible.

How? RealPlayer

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Is this on a Mac?


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Originally Posted By: Matt Finley
Is this on a Mac?

No.
Win 11 PC


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Hello Steve,
So there are numberous apps to transfer the Audio Only from a Youtube video. I know this because I have used most of them. And most of them work well. But since this is a sketchy operation it is not unusual for all of these to fail for one reason or another at one time or another. As a result, after years of hit or miss, I settled in on what I find to be the most reliable for me.

I use Audacity, a free PC Recording application. What it does is simply record to audio what ever you are sending to your PC speakers. So, first I configure Audacity to record my Speaker output, then I arm the Audacity track. Hit record on the Audacity Track and immediatley hit play in YouTube. After all is done. I then save the recorded Audacity track as mp3 or .wav or whatever audio format I care for. Drag and drop that into Reaper and all is good. If there are any audio glitches, I simply repeat the process.

The only challange with this is the Audacity configuration can be tricky at first. So I have written down exactly what I need to do. Fact is if I only use Audacity for this single purpose, I just set it and forget it. That is until I have an update and all settings go back to default. crazy


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I tend to do those kinds of things from Linux and I haven't done it for quite some time, but I believe there Windows-runnable versions of both youtube-dl and yt-dlp. I know not if they have any artefact issues. Maybe worth a look if Dan's method doesn't work for you.


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Originally Posted By: MusicStudent

I use Audacity, a free PC Recording application. What it does is simply record to audio what ever you are sending to your PC speakers.

Dan, has anyone ever called you a walking library?

As it turns out I have attempted this with Audacity in the past and I think it messed up or disconnected my audio drivers. And I found that RealPlayer [usually] does this well with a small footprint on my other applications. These "RealPlayer gremlins" happen randomly and only on occasion. I'll guess that it's 95% reliable.

I sent Matt a snipett of the problem and will see if he comes up with anything. If not, I think I'll just re-download the video with RealPlayer again and I'm almost certain the portfolio of gremlins will be different and hopefully, non-existant.

My thinking behind posting this problem is it may be possible to "filter" the audio file in some way, perhaps with a low-pass filter or similar. I also thought that someone here might have a contact at the makers of RealPlayer that could shed some light or at least put this on their bug list, assuming RealPlayer is the problem.


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OK, I listened to the audio snippet Steve sent, and my equipment is quite good.

I do not hear any noise or pops or distortion etc., the sort of audio glitches I might have expected to hear. I DID hear an odd bit of unexpected audio, almost like someone in the background playing a rinky-tink piano. Is that what you call the 'gremlin' here?

Please give me a link to the YouTube audio and tell me the time stamp corresponding to the audio snippet you sent. I want to listen as carefully to the source.

First wild guess: does your PC have any other audio programs running that could have contributed to this, such as a streaming audio player like Pandora?


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When one download application glitches another download application may not. +++ HERE +++ is a Windows YouTube to MP3 application that works well for me.

Like Dan I am also fond of using Audacity's "Record What You Hear" mode which works very well.


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Dan, I use that method also! I also use it for recording records to MP3s.

I guess great minds do think alike!


Unclear if the pianist is a total beginner or a professional jazz player?

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Record "what you hear" sounds like the old Creative Soundblaster units. I actually miss that function.

I record whatever is playing audio by routing the soundcard output to Adobe Audition, a product similar to Audacity.


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Originally Posted By: Matt Finley
OK, I listened to the audio snippet Steve sent, and my equipment is quite good.

I do not hear any noise or pops or distortion etc., the sort of audio glitches I might have expected to hear. I DID hear an odd bit of unexpected audio, almost like someone in the background playing a rinky-tink piano. Is that what you call the 'gremlin' here? Yes, a phone's ring tone is another way to describe this.

Please give me a link to the YouTube audio and tell me the time stamp corresponding to the audio snippet you sent. I want to listen as carefully to the source.

https://www.youtube.com/watch?v=eAR_Ff5A8Rk

I wouldn't be surprised if you find no problem when you download/convert this video. See above reply to Dan. The timestamp is around 4:14.

First wild guess: does your PC have any other audio programs running that could have contributed to this, such as a streaming audio player like Pandora? I do have Pandora on my PC but never streaming when I download videos.


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In the YouTube video, I hear the same rinky piano at that same place, in the left channel, exactly as in your audio snippet. If that were me as the audio engineer, I would suspect somebody left a fader up accidently for a second. Of course, I think engineers in the day used to leave those little easter eggs for folks to anguish over...

I think your software captured the audio correctly, at least as it is on YouTube (which does employ its own compression algorithms and who knows what could happen, but I don't think this). Either that, or you are hearing something I'm not.

Given that it is not terribly loud, you could perhaps use a plugin to put a Gate on the audio and hope it kills this without altering anything else. Touchy adjustment, though.


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An interesting update.
I just re-downloaded the same video using RealPlayer; this time NO applications running except my browser. And once again, the same gremlin at the same timestamp is present.

This I did not expect.

I wonder if this is an intentional "watermark" embembeded into the audio file for some (unknown to me) purpose.


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I do not know the tricks YouTube might use, but I could understand if they or the publisher or ?? desired to add this little snippet of sound as a digital watermark. The irony is that YouTube is the world's biggest offender.


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Originally Posted By: Matt Finley
In the YouTube video, I hear the same rinky piano at that same place, in the left channel, exactly as in your audio snippet. If that were me as the audio engineer, I would suspect somebody left a fader up accidently for a second. Of course, I think engineers in the day used to leave those little easter eggs for folks to anguish over...

I think your software captured the audio correctly, at least as it is on YouTube (which does employ its own compression algorithms and who knows what could happen, but I don't think this). Either that, or you are hearing something I'm not.

Given that it is not terribly loud, you could perhaps use a plugin to put a Gate on the audio and hope it kills this without altering anything else. Touchy adjustment, though.

You are absolutely right Matt . . . the YouTube video itself is flawed. Here I am assuming that an "official" video would always be clean, pure and error-free!

I think this might exonerate RealPlayer and we certaily can't blame Carol.

Leave it to me to uncover interesting problems . . . smile


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Ya starting at 4:11 in the YouTube Video...,

"...winter spring summer or Fall, ...All you got to do IS CALL..."

I think I hear a bit of sonic disruption in the left speaker under the vocal IS CALL. This would be something only the recording engineer should catch.


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OK folks, so I'm full circle back to my original question for you Professional mixing engineers.

Is there a way to isolate and surgically remove this bit of musical cancer without killing the patient?


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