Is it possible to use Soundcloud API in Roblox?

Don't ask a question if you can easily look this up in the wiki or on google, that's what the websites are for! These are for broken scripts. Any trivial questions like these that can be searched on google, stays in google.

What part of it? What exactly do you want to do?

If your question can be answered "yes or no", it's not a good fit for this site.

Hmm, Sound files from websites transferred to roblox? That would be stealing music because you would need to pay to upload sound to roblox. They only use assets from their own website for files(Haven't tested, proove me wrong!) and if they don't fit the description of under 2 minutes and it must be a mp3, then it won't send. A wav, a mp4, mid wont work. No this isn't possible unless from the roblo

x catalog (too long to fit in one comment)

You could make a sound, change the pitch depending on the sound on soundcloud. MIDI.