Hello. I've recently bought a Kikkerland 15 from Amazon and I tested out the default song that comes with it, "Happy Birthday". While playing it, I noticed there're certain notes that sound like they're smashing together. If anyone is familiar with the default sheet, would this be a problem with the sheet itself, or the music box? Any help would be much appreciated.
Video of playing the song on my box (youtu.be/): /sw3-lmxC6G0