Accidental written twice

1. What is a double accidental?
2. Do accidentals carry through bars?
3. Does an accidental apply to all octaves?
4. What is an accidental How long does an accidental last?

What is a double accidental?

Double accidentals raise or lower the pitch of a note by two semitones, an innovation developed as early as 1615. This applies to the written note, ignoring key signature. An F with a double sharp applied raises it a whole step so it is enharmonically equivalent to a G.

Do accidentals carry through bars?

An accidental carries through the bar affecting both the note it immediately precedes and any following notes on the same line or space in the measure. Accidentals are not repeated on tied notes unless the tie goes from line to line or page to page.

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 is an accidental How long does an accidental last?

How long does an accidental last in music? Accidentals last only until the end of the measure in which they appear. In the example below, note C sharp (in bar 1) is cancelled by the bar line. This means that note C in bar 2 (beat 1) is no longer affected by the sharp.