>>35899889i'll use this post
>>35900665 as an example.
>1. upload an mp3 file somewhereeg. catbox
>2. prepare a gif or webm fileeg.
https://files.catbox.moe/ncy2dn.mp4>3. copy the file name and encode it using url encodeeg. https%3A%2F%2Ffiles.catbox.moe%2Fncy2dn.mp4
>4. name that gif or webm file in this format:>webm filesxxxxxxxx[sound=encoded_url].webm
or
>gif filesxxxxxxxx[sound=encoded_url].gif
where:
xxxxxxxx is your message, i think it's optional you can leave it blank
encoded_url is your catbox (or whatever) file url but url encoded.
eg. UOOOHHH[sound=https%3A%2F%2Ffiles.catbox.moe%2Fncy2dn.mp4].gif