Can someone help me? I searched Google for 2 weeks to find a way to turn .mp3 files into .ncs files to play custom music for Note Block but all failed, I also looked for mp3 music variables into a new format like .nb3 ( lmao), it downloads the mp3 file into the above format for reloading into the plugin, which is nice if this works, we just need to drop the mp3 and get the custom music. -., but Php does not support this barbaric idea
The problem is that a noteblock audio file works kinda like a MIDI as in, the file contains individual notes on different tracks with different instruments. You will need to search for a MIDI file which you can then export as a nbs file in Noteblock Studio. (note that there are tools that claim to be able to convert mp3s to MIDIs but they don't produce very good results)