Chaco Chaco is a popular South Korean Youtuber whose claim to fame is the ability to reproduce popular songs on one or multiple musical calculators.
Calculators are handy when dealing with math, but one particular calculator is actually more popular as a musical instrument. The Egoelife AR-7778 and AR-8001 are designed as instruments and even come with instructions on how to use them as such. But, just like with any other musical instrument, you need talent and practice to produce music worth listening to, otherwise, you’re just using it as a cool toy. That’s what sets Chaco Chaco, a musical calculator artist with over 800,000 subscribers on YouTube alone, apart from pretty much any other musical calculator user.