The Triad Sudoku WorkbookAs musicians, its essential to recognise the importance of understanding triads as the building blocks of Western harmony. A triad is a combination of three musical notes heard simultaneously as a chord or in succession as a single note melodic line. Commonly, triads are built in intervals of thirds (tertial), but they can also be heard both melodically and harmonically built with a combination of different intervals (non tertial). For any student of