It’s music that is literally over 1,000 bpm. It got the name “Extratone” because sometimes the beats go so fast it sounds like one
single note. Some Extratone artists are Diabarha, Aeswa, Hylna. It’s parent genre is Speedcore, which is at around
300-600 bpm. But some extratone songs are at 10,000 bpm, making speedcore almost nothing (not making fun of any speedcore fans). Sometimes, Extratone may just reach the bpm of 50,000, if you could still call it “Extratone”. Many
people call it “Supertone”. One example of Supertone is The Side Of The
Dark by Diabarha. Extratone scares me sometimes.