The B-Flat major scale is a musical scale that consists of the notes B♭, C, D, E♭, F, G, and A. It is built using a specific pattern of whole and half steps: whole, whole, half, whole, whole, whole, half. This scale is commonly used in various musical genres, including classical, jazz, and pop. In terms of key signature, the B-Flat major scale has two flats: B♭ and E♭. Instruments like the trumpet and saxophone often use this scale, as they are commonly tuned to B-Flat. Understanding this scale is essential for musicians to create melodies and harmonies in their compositions.