8a b.

The notation 8a or 8va is sometimes seen in sheet music, meaning "play this an octave higher than written" (all' ottava: "at the octave" or all' 8va). 8a or 8va stands for ottava, the Italian word for octave (or "eighth"); the octave above may be specified as ottava alta or ottava sopra).

It's not wrong to say 8va - it stands for "ottava" (octave) and can be used to mean above or below. 8vb is actually meaningless, even though some books do allow it and you do see it in pop music especially in English-speaking countries. The more correct abbreviation other than just 8va, though, is 8ba (for "bassa").

The musical symbol 8vb (an abbreviation of ottava bassa, or “low octave”) is an indication to play notes an octave lower than written on the staff. 8vb eases the reading and writing of notes off the staff, which would otherwise have multiple ledger lines (see image).

at the octave below Abbreviation for ottava bassa or "at the octave below." This indication is found below specific notes on a staff and indicates that those notes should be performed one octave lower than written.

If the bottom number is a 4, it means the beats are quarter notes (four quarter notes in a measure). If the bottom number is 2, it means the note value is half notes(half notes per measure). And if the bottom number is an 8, it means the beats are 8th notes.

Usually a modification of the numeric figure with b, #, + means an alteration from the key signature. In this case both the 6b and 7b refer to the A and that is already a flat from the key signature.

Below a note in bass clef it means to play an octave lower. Strictly speaking you should not see it in any other position/clef, but there is a lot of poorly notated music in the world. Sometimes for the lower octave you will see "8 ba" for "all'ottava bassa".

8va is short for “ottava”, 15ma is short for “quindicesima”, and 22ma is short for “ventiduesima”; as such, it is nonsensical to replace the suffix va with vb, or ma with mb. The recommended abbreviation for 8va bassa is 8ba (ottavaBassaBa), which is included.

"Vb" is the V chord, first inversion (3rd in the bass).

Generally engravers will just use “8va” or even just “8,” and the direction of transposition is indicated by where the symbol is placed: if it is above the notes, it means to transpose up and octave; if it is below the notes, it means to transpose down an octave.

8va stands for ottava - the Italian word for octave. The notation 8va (as seen in sheet music) means to play this an octave higher than written.

The eighth note, or octave, is given the same name as the first, but has double its frequency (first harmonic). The name octave is also used to indicate the span between a note and another with double frequency.