Sporadic warping/twisting sound to vocal-only recording

All right, I uploaded the original test file for anyone who wants to hear what I’m talking about instead of just reading about it:

https://www.dropbox.com/s/
k2yuzkcmpuj8m4t/Harry%27s%20test.mp3?dl=0

(merge those two lines for the full URL… for some reason, this forum software really just wanted to generate an inline playable link for that file, but as was mentioned previously, as a new user, I’m not yet allowed to do that, so hopefully this approach works instead).

Enunciation issues and blah, I know. Again, this was just a quick sound and level check more than anything. But listen to the twisting effect on “razors”, “smoothly across your skin”, and on re-listening – at least, on my crappy laptop speakers – I’m also hearing it a bit on “comfortable grip”.

That’s the issue I’m contending with.

Close. That’s an HTML web page production file. Not sound. If you Control-Click on the player, it will show you what it is and offer to download it.

Do you have your computer set to show you file name extensions? Very Highly Recommended. It would have shown you the file type instead of guessing at it.

Screen Shot 2023-05-17 at 8.51.22 AM

Koz

Surprisingly good quality for that setup. I would never have guessed that environment and approach would get that result. Well done, sir.

Sorry, not sure what you’re referring to. The file is showing on my computer as an MP3, and that’s the file I dropped into Dropbox and linked to. Is it not showing that way from the link? :thinking:

It wouldn’t work as well if the garage has a flat roof, or if I was neat and clean. The cardboard boxes and trash soak up the echos and reflection distortion. That’s the talking in a kitchen or bathroom effect.

There are two furniture moving pads on the door.

Screen Shot 2023-05-17 at 8.56.55 AM

The phone insists on working through iTunes which is no longer supported. I found a software package to manage the files, and I’m going to find the name any second now.

Koz

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Oops. I was expecting a sound file, not a reference to DropBox.

Try the MP3 direct forum upload again. We’re trying to sort how many times you have to try before it lets you in.

Koz

Sure thing.

I’ll try the upload here…

Hey… looks like it worked? Maybe?

I’m racing out to buy new blades.

I’m listening multiple times…

Koz

Man, I’m hearing that warping all over the place on re-listening to it. Maybe I’m just projecting? Maybe it’s my crappy laptop speakers?

Now I’m hearing on “blades”, “comfortable grip”, “service”, “when you need them” (a bit), “irritation”, “hello” (though that sounds more hollow than warpy, maybe), and, like, most of the outro bit.

And it doesn’t do this with any other copy I’ve tried.

GAH.

Don’t buy TOO many. It’s not like I’m getting kickbacks…

I think I have about 15 posts in this thread, and a couple in a different thread. So I’d guess the magic number of posts to no longer be “new” is in the 10-12 range?

Everything is distorted. That’s what digital compression distortions sounds like. Like trying to create a super tiny, efficient MP3 file.

MP3 gets its efficient sound files by re-arranging musical tones and throwing some of them out. It’s permanent. There is no backing out of that distortion. That’s why we tell people never do production in MP3.

I bet you’re wondering why ACX insists on you delivering audiobook material in MP3. That’s a business decision, not sound quality. They have to store all those files. They insist on 192 sound quality, minimum, and strongly suggest mono production. That’s stupid high quality for a compressed file and they can create other sound products without audible damage.

I need to read over everything we told you to do so far…

Koz

Audacity will not affect the incoming sound quality, but you can tell Audacity to be a really terrible recorder.

Audacity > Edit > Preferences > Audio Settings

Audacity> Edit > Preferences > Recording

Anything odd there?

Koz

Those are the two 1/8" sockets on the back of a Mac Mini. Yours will say something else.

Koz

And it wasn’t even subliminal!!!

Sorry for the “useless” joke… I know you’re all trying to solve a problem here… I couldn’t control myself.

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Perhaps you need some subliminal affirmation.

Koz

The mp3 bitrate on “Harry’s Test” is only 74kbps …

74kbps

That’s OK for Dictaphone-quality voice-message, but for broadcast-quality voice-over you need 256kbps, or even the maximum 320kbps.
https://manual.audacityteam.org/man/mp3_export_options.html
Or better still use an uncompressed format like WAV.

There may be other issues in addition to mp3 damage:
could “Harry’s Test” be a recording via computer’s in-built microphone, rather than the out board SM58 ?.

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This is what File > Export > Export as MP3 can look like for an audiobook submission.

Koz

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Do you know where your computer’s built-in microphone is? Never blow into a microphone. You can do a scratch test.

Koz

Ah. Good point. Thanks.

Having said that, the original twisted distortion is still on the original (i.e. not exported) recording, so it probably sounds worse the way I exported it (may be why I’m hearing more of it), but the exporting issue isn’t the cause of the original problem.