Develop Library Audio Roblox is the page on Roblox consists of the information about the audio. as you can see, the audio is the asset category in the library. This kind of thing is able to be used within the place through Sound objects.
On September 25, 2013, all Roblox players could upload the MP3 files to be published after moderation. Before uploading audio was permitted, sounds were the only one that could be uploaded to the Roblox Catalog by administrators, most of which was provided by Roblox or RobloSam. At the time, the system only let 15 seconds of audio and the price was 250 Robux per audio asset, allegedly set up to prevent misuse of the feature. However, the thing called the loopwhole was discovered shortly afterwards, in which all the Roblox players could technically upload the full song by speeding it up to the point where the duration of the song became 15 seconds and the creators could tweak the pitch to be lowered at the certain value which was normally predetermined by the uploader in the description, for the full song to play normally.
Basically, for the length of 0 to 10 seconds, the price is 20 Robux. For the length of 10 seconds to 30 seconds, it costs 35 Robux. For the length of 30 seconds to 2 minutes, it costs 70 Robux. As for the length of 2 to 7 minutes, the price is 350 Robux.
On January 15, 2014, Roblox changed the sound limit to 120 seconds, 8 times the length of the last limit, and the cost decreased by 60% to 100 Robux, which allows the longer audio to be uploaded for the lower price. It is said that the update proved to be successful as it reduced the hassle of uploading multiple short samples of the long audio and also reduced the complications that came with the pricing. On September 26, 2016, the sound limit was changed again to 6 minutes, while the cost would be change to the dynamic pricing system. In less than a month, the dynamic pricing system and the 6 minute audio limit would be temporarily retired while some other issues would be fixed. About a week later, the 6 minute audio was back. The reason of why it was temporarily retired remains unknown. On late 2018, you could purchase the audios for 35 Robux only instead of 75 for audios ranging from 30 seconds to 2 minutes. As of 2019, all the audios are back to 70 Robux for 30 seconds to 2 minutes. The reason behind it was probably the glitch with the systems.
Just like any other things on Roblox, each Roblox audio has a unique ID found in the URL of the audio page. A bit different compared to the other objects, the audio IDs do not need to be subtracted and are given directly. For those who are not really familiar with it, please keep in mind that the audio IDs are used when creating the Sound objects.