Uploading .ogg files magically turns into .mp3 files

[Operatik]

Reproduction Steps
The provided link to an asset is one of many impacted issues. Thanks to @Zacchary21 for testing the upload.

The link provided contains an audio that was supposedly uploaded as .ogg file, but when uploaded, the file turns into .mp3. Reproduction is easy:

1. Create any .ogg file
2. Upload the said file to Roblox
3. After auto-mod review, open inspect element and retrieve the CDN link to the audio
4. Attempt to download it and check its extension, it will show .mp3

This link discusses about the bug that first happened, which was thought to be an audio edit issue, but turns out to be otherwise:

Uploading audio loops; unwanted silence

I understand this isn’t the right category, but I can’t post in the bug reports category for some reason. The Issue: When uploading audio loops in the .ogg format to roblox through studio or the website, studio will add unwanted silence to the end (or beginning I can’t tell yet) of the audio file. This creates a break in the would be perfect loop. What I’ve noticed: This is an issue that has only recently come up. I had previously uploaded another loop a couple of days ago that worked just fin…

Expected Behavior
The expected file the content delivery network provides is a .ogg.

Actual Behavior
The expected file provided is a .mp3.

Issue Area: Roblox Website
Page URL: lte - Roblox
Impact: High
Frequency: Constantly
Date First Experienced: 2021-06-15 21:06:00 (+02:00)
Date Last Experienced: 2021-06-15 21:06:00 (+02:00)

[PeZsmistic]

To emphasize the importance of this issue, there is no other way to create seamless audio on Roblox due to the nature of the MP3 format. This issue is extremely important to developers working with ambient audio and other looping sounds.

[Hippie_ofDoom]

Thanks for the report! We’ve filed a ticket to our internal database and we’ll follow up when we have an update for you.

[Operatik]

Apparently, this bug has been resolved recently, indicated by the linked topic above.

[qwertyexpert]

Could you elaborate a bit on why the MP3 format cannot be used for seamless audio? Does it have to do with the compression or something else?

[Operatik]

There is a padding added on .mp3 formats, causing a slight silence before playing the audio. More information found here:

Gapless playback

[PysephDEV (Pyseph)]

Are affected assets working fine now? or do they need to be re-uploaded?

[Operatik]

Probably re-upload is required, assets don’t change by themselves.

[Hippie_ofDoom]

This issue should now be fixed! If this issue is still occurring, please create a new topic for us to look into.