"Gill Smith" wrote in message news:***@brightview.co.uk...
lots of songs have a bar of 2/4 time inserted into 4/4 time
but
does anyone know of an instance of *two* consecutive bars of 2/4 time
inserted into 4/4 time?
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There would be little reason to do so.
2 bars of 2/4 would be 1 bar of 4/4.
Meter is not something that has an instantaneous value. You cannot perceive
the difference between a bar of 4/4 and 2 bars of 2/4 in a song that is in
4/4 because your *ear* has no reason to. There are rare cases where it is
possible but it will still be perceived as 4/4 by the majority of the
people.
Just because you notate something in 2/4 doesn't mean it is 2/4.
What you really should be asking is what is meter and what makes a song 2/4
vs 4/4.
2/4 is a regularly occurring pattern of strong weak. Note we need several
bars to occur before we can perceive the pattern.
4/4 is a regularly occurring pattern of strong weak medium weak.
When you have just one bar of 2/4 inserted in a group of 4/4 bars the
accents change where the strong swaps with medium.
When you have 2 consecutive bars of 2/4 inserted in a group of 4/4 bars the
accents do not change and you just have a single medium accent becoming a
strong accent. This is heard not as a change in meter by most people but a
syncopation. A syncopation is a temporary change in accents and this is what
you will hear.
Assume we have been hearing 4/4. That is S W M W accents.
4/4 4/4 4/4
4/4 2/4 4/4 4/4
4/4 2/4 2/4 4/4
4/4 3/4 4/4
S W M W S W M W S W M W
S W M W S W S W M W S W M W
S W M W S W S W S W M W
S W M W S W W S W M W
Notice that in each case how the accents have changed.
In the 3/4 example the normally strong beat has actually become a weak beat.
To see this just compare the 3/4 case with the 4/4 case which is what the
listener is expecting(probably).
S W M W S W M W S W M W
S W M W S W W S W M W
See how in the 3/4 case, since we lost a beat, everything was shifted to the
left one beat and now what was strong becomes weak. It can be awkward
specially since it is not common. If the piece of music just inserts a bar
of 3/4 randomly it will sound awkward and wrong to most people in most
cases.
Now, for your specific case we have
S W M W S W M W S W M W
S W M W S W S W S W M W
Note that after the 2 bars of 2/4 are up everything is aligned again. The
only differences is that a M became an S. No big deal. It is not awkward at
all. No one will hear a "meter change" because one didn't happen. You could
notate it in 2/4 for convenience BUT the meter is still 4/4.
For the single 2/4 case though,
S W M W S W M W S W M W
S W M W S W S W M W S W M W
Notice that after we bar of 2/4 the S and M accents have flipped. This is
not a huge deal in most cases because it was intentional and occurs at the
start or end of a section only. If it occurred in the middle of the piece
what will be heard is if the 1 and 3 beats got flipped. So your chord
changes, which usually occur on the 1, might start sounding like they are
occurring on the 3. Most people will quickly readjust their down beat to fit
with this. If it is at the end or beginning of a section it is no big deal
as the down beat is almost always perfectly clear.