Yes, a semibreve (or whole note) is worth 1 beat in some time signatures, particularly in 4/4 time where it can be held for the entire measure. However, in other time signatures, its duration may be interpreted differently, so it's essential to consider the context of the music. In general, the semibreve represents a longer duration compared to other notes, such as crotchets (quarter notes) or quavers (eighth notes).
A whole note is worth 4 beats, a half note is worth 2 beats, a quarter note is worth 1 beat, an eighth note is worth 1/2 a beat, a sixteenth note is worth 1/4 of a beat, a dotted half note is worth 3 beats, and a dotted quarter note is worth 1 and a 1/2 beats.
A quaver is worth half the beat of one beat of a bar.
In standard time it is worth one beat.
A quaver is half a beat; a crotchet is one beat; a minim is two beats; a semi-breve is four beats.
It has one beat.
A dotted note is worth one and a half times the worth of the same note without the dot. eg. a crotchet is worth 1 beat so a dotted crotchet is worth 1 and 1/2 beats. or, a quaver is worth 1/2 a beat so a dotted quaver is worth 3/4 of a beat.
A whole note is worth 4 beats, a half note is worth 2 beats, a quarter note is worth 1 beat, an eighth note is worth 1/2 a beat, a sixteenth note is worth 1/4 of a beat, a dotted half note is worth 3 beats, and a dotted quarter note is worth 1 and a 1/2 beats.
A quaver is worth half the beat of one beat of a bar.
1/4 beat
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In standard time it is worth one beat.
A quaver is half a beat; a crotchet is one beat; a minim is two beats; a semi-breve is four beats.
It's worth 1 beat of the bar, eg. if it's a 4/4 time, it would be worth 1 of those 4 beats.
It has one beat.
a quarter note
an eighth note or a quavier is worth 1/2 a beat in the bar so the decimal is 0.5
In common (4/4) time, a crotchet gets one beat.