Bis is a Latin prefix or suffix designating the second instance of a thing, thus preceding ter. An example in recent modern usage is the ITU-T modem standard from the late 20th century, V.32bis. Bis can also refer to:
Pachelbel's Canon in D major, a piece of chamber music scored for three violins and basso continuo and originally paired with a gigue in the same key, experienced a tremendous surge in popularity during the 1970s.
The key of F has 1 flat. That means the flat must be the first flat (Bb). All the other letter names are natural notes. Now, starting on the root of the scale F, we can spell the key of F major â F, G, A, Bb, C, D, and E. As another example, the key of Ab major contains 4 flats.