The note block song is in the same key as the original. It was initially built using Minecraft Note Block Studio, manually adding all the notes by ear. The note blocks were then converted to command blocks to spawn note blocks in the area shown in the video via /setblock commands, using an MCEdit filter I made. The pling.ogg note block sound was used for the vocals. My note block world can be downloaded from the link in the bottom right corner of my Youtube channel banner (or from the About section if you're on mobile). Thanks for watching!.