Do accidentals in a figured bass last the full measure, or do they only apply to that single chord?

1. Do accidentals last the whole measure?
2. Does an accidental apply to all octaves?
3. What does an accidental mean in figured bass?
4. Does an accidental apply to both clefs?

Do accidentals last the whole measure?

Accidentals last only until the end of the measure in which they appear. ... Accidentals appearing on a bar, affect every note on that space or line for the remaining of the bar unless cancelled by a natural. In the example below, note B flat in beat one, affects the B on beat 3 as it is on the same line.

Does an accidental apply to all octaves?

Accidentals apply within the measure and octave in which they appear, unless canceled by another accidental sign, or tied into a following measure. If a note has an accidental and the note is repeated in a different octave within the same measure, the accidental does not apply to the same note of the different octave.

What does an accidental mean in figured bass?

Accidentals. When an accidental is shown on its own without a number, it applies to the note a third above the lowest note; most commonly, this is the third of the chord. Otherwise, if a number is shown, the accidental affects the said interval.

Does an accidental apply to both clefs?

No. Each accidental applies only to ONE KEY on the keyboard. Each accidental applies only to one line or space within a staff. If the same key is shown in both clefs, you need an accidental for both.