- [Teacher] The other
most commonly used clef is the bass clef, used
for the bass instruments like the trombone, tuba, bassoon, cello, string bass, and the
bass notes on the piano. First we begin with the five
horizontal lines of the staff. And then add the bass clef to
the beginning of that staff. The lowest space is an A. As we ascend from that
space to the second line, and then to the second space and upwards, we once again spell out the
seven letters of the alphabet. A, B, C, D, E, F, G. With the top line repeating
the pattern with an A. Once again the low A to the upper A is eight steps or an octave. Now notice the two small dots
on the right side of the clef. These dots are on either
side of the fourth line where the F sits therefore the bass clef
is also called an F clef. Continuing to ascend beyond
the A on the top line is a B. If we add a ledger line, we now have a C. Now let's put the treble
and bass clefs together with the treble clef above the bass clef. The first ledger line
C above the bass clef and the first ledger line
C below the treble clef are the same note. Putting these two clefs together
creates the grand staff. And the C that we just
wrote with one ledger line above the bass clef and one ledger line below the treble clef is called middle C.