English: After every second, a harmonic is added on top a 220Hz sine wave, creating a 220Hz triangle wave.
This file is generated using wavepot.com. The source code can be found here: wavepot
Tiếng Việt: Sau mỗi giây, một sóng điều hòa được cộng vào sóng sin 220 Hz ban đầu, tạo thành sóng tam giác 220Hz.
File được tạo từ wavepot.com. Mã nguồn: wavepot
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