Is there any practical difference between 3/4 and 3/8 time?

Question

Is there any practical difference between 4/4 and 8/8? regards a common and unusual time signature; both 3/4 and 3/8 time are pretty common.

What difference in performance is implied in the the difference between 3/4 and 3/8 time signatures?

What would lead a composer to notate a work in one or the other?

Answer 1

These two time signatures both indicate simple triple time (also known as waltz time). They are mainly used in the same genres:

• Formal dances such as waltzes, minuets, mazurka, and scherzi
• Country, R&B
• Western ballads
• sometimes pop

All of these genres commonly use simple triple time i.e they have three beat per measure (usually with the first beat being the strongest). The obvious differences between 3/4 and 3/8 are the number and length of the beats (there is one other simple triple meter, 3/2). 3/8 has three quavers and 3/4 has three crotchets. However, 3/8 time usually suggests a higher tempo or a shorter hypermeter than 3/4. This is not always the case as there is no strict rule, but it is often implied.

Answer 2

Typically from what I've seen, 3/4 music is conducted using three baton movements per measure, whereas 3/8 music is conducted with a single baton downbeat per measure; I'd consider 3/8 to be closer to 6/8 than to 3/4 in terms of feel and conducting.

Answer 3

There's no absolute rules as to when a composer should use one over the other - it often comes down to the tempo and feel of the music, but it is subjective. I've (for better or worse) seen Presto 3/4 pieces that go much faster than some 3/8 pieces.

The big difference in terms of timing is that 3/8 is mainly used as a compound time, whereas 3/4 is most commonly conducted in simple time. So if the composer "felt" that a bar should be conducted as a single unit rather than 3 individual beats, that might be a particular reason to choose one over the other. Tempo of course does come into it as well.

Of course, then we get to the question of why 3/8 should be used over 6/8, and so on - sometimes when the phrases work in odd numbers this is clearer, but more often than not it's just at the composer's discretion to emphasise various beats and timings slightly differently.

Answer 4

3/8 is more suggestive of a single beat per measure (a dotted-quarter note made up of 3 sub-beats) whereas 3/4 is more suggesting of three beats per measure (each a quarter note).