That is correct, there are four semiquavers in a crotchet.
The value of one semiquaver is equal to a quarter the length of a crotchet. A crotchet is worth one beat, while a semiquaver is worth a quarter of a beat.
A semibreve is four times longer than a crotchet. If you imagine a semibreve with a length of 64 (for theory's sake) as a 'whole note', a half note with a length of 32 is a minim, a quarter note with length 16 is a crotchet, etc. The list goes on. Here's a helpful link: http://neilhawes.com/sstheory/theory12.htm Scroll down to the table and you should find that very illustrative. {| ! ! | ! | ! ! ! | ! | ! ! ! | ! | ! ! ! | ! | ! ! ! | ! | ! ! ! | ! | ! ! ! | ! | ! ! ! | ! | ! | |}
A sextuplet of semiquavers (that only occurs in simple meters) worth the value of a crotchet (i.e. four of the same notes; semiquavers).
If the crotchet is considered to have the unit beat, a semiquaver has 1/4 beats.
6 semiquavers worth a dotted crotchet
If the duration of a crotchet is taken as a unit beat; a semiquaver has 1/4 beats.
A semiquaver is a quarter of a beat, if one considers that a crotchet is one beat. Four semiquavers equal one crotchet. However, a semiquaver is actually known as a sixteenth note, because 16 semiquavers equal on semibreve, and the semibreve is regarded as a "whole note".
A crotchet is a musical note that represents one beat in a piece of music, while a quaver represents half of a beat. Therefore, adding a crotchet and a quaver together would equal one and a half beats. In musical notation, this combination would typically be represented as a dotted crotchet.
Semiquavers are sixteenth notes. If you want to find out how many notes are in a semiquaver, you must clarify the type of note. There are two demisemiquavers in a semiquaver, four hemidemisemiquavers in a semiquaver, and eight semihemidemisemiquavers in a semiquaver.
There are four semiquavers in a crotchet.
One. A semibreve is a Whole Note. However, there are two (2) half notes in a whole note, and there are four (4) quarter notes, and eight (8) eighth notes, as well as sixteen (16) sixteenth notes. You get the picture.
Presuming you're in crotchet time e.g. 4 time 4 an eight beat note is called a breve a four beat note is called a semibreve a two beat note is called a minim a one beat note is called a crotchet a half beat note is called a quaver a quarter beat is called a semiquaver an eighth(1/8) beat is called a demisemiquaver