For example, fast waltzes being conducted in cut time. A conductor conducting the second movt of the 9th, where the mm marking is about dotted minim = 116, of course you can't flap your arms around that fast. But I would argue that this is nothing to do with cut time, but is rather a technically and musically sensible way of conducting a fast 3/4. Cut time is 2/2 after all.No, fast waltzes are not conducted in cut time, they are conducted in one. They are different. 3/8 , and 3/4 can be conducted in one. It is the technically and musically sensible way of conducting a fast 3/4.
OK. You are thinking that what I'm saying is just not true, and you know better. But, all I ask is that you just put what I'm saying at the back of your mind somewhere, and just think about it in future perhaps.No, I agree with you, except Cut time is 2/2 and counting in 1 is reserved for counting fast triple meter. Any conductor can tell you that.
To illustrate my point, let me make a few comments about the Moonlight Sonata which you mentioned. Well, I had a look at the four editions of the Beethoven Sonatas I have at home, and they all indicate cut time. Beethoven wrote cut time. And think about this: Why did Beethoven write cut time and not 4/4? Well, it's because cut time is different musically from 4/4. Cut time is just not the same musically as 4/4.
I would suggest that any editor changing Beethoven's time signature from cut time to 4/4 just doesn't get it, and should get another job! Musical vandalism! Let's put a moustache on the Mona Lisa? I don't think so!Well I mention it because a student would bring in the sonata and I would start teaching and saying this piece is in cut time and then look at the music and it is not! Yes their are some stupid editors, so I go ahead and correct their music. There are some lazy editors out there.
I did mention that people choose cut time for musical reason before, right? Of course composers choose the time signature for musical reason. Thats what I said , the choose it depending on the character of the music, how easy it is to read, etc.
We will also have to disagree in regards to your analysis of quadruple meter simply being two duple meters joined together. If I understand you correctly, in the way you see it, in a 4/4 bar, beats 1 & 2 and 3 & 4 are much the same. But I would argure that they are not. The first beat is subtley different from the third beat, the second beat is different from the fourth. So, a 4/4 bar is not the same as two 2/4 bars glued together. It is not really my analysis of quadruple meter. I have heard some people label 4/4 in quadruple meter and some label 4/4 in duple. Thats why it depends on who you talk to. I am not saying one is right and one is wrong, I just choose to explain 4/4 with the least complicated route. What you are talking about in the above paragraph are the strong weak stress of 4/4. You are talking about performance and I am talking about notation. You can duple music in 4/4 and 2/4 or 2/2 regardless on stress. But yes your right this is what you are talking about
division- | | | | | | | | | | | | | | | |
pulse- | | | | | | | |
grouping | | | |
2nd grouping | |
1 2 3 4 1 2 3 4
Sorry this does not line up very well

, but yes 1 and 3 are stressed on multiple levels which makes them stronger. The division of the pules( 1+,2+), the main pulse, the grouping of 2s and the the down beat of each bar makes the one "stronger" (stress is better) than the 3.
So why does a composer choose to notate a piece in cut time, 2/4 or 4/4, or 3/4 or 6/8 or 9/8 or a mixture of the above? It's for musical reasons, and musical reasons only. It is not for us mere mortals to question or change anything, but rather to try to understand what the composer intends. Nor should we cut corners or do what is convenient or easier for us.
Well , it would be easier to explain this if I could draw you the music so you could see a simple tune like this but imagine you have simple tune like Yankee doodle in 4/4 time. You could write it in 2/2, 4/8, or 2/4 time. If I played that on the piano, would you be able to tell which meter I was reading in? If I were to stress ( in 4/4 time) 1 and 3 you could guess 4/4 but if I played it dryly with no stresses then it could be any one them. However if you look at the music , the 4/8 version of the song (where there are 4 eight-notes separated) is not as easy to read as 4/4 time. If you are a beginner and had a choice between a simple piece of music in 4/4 time or 4/8 time, which one would you choose? That is part of the reason 4/4 is common because people wanted to sell their music. If you wrote in. Not for musical reasons only. Musical is really vague. The reason is performance value (which notes they want to be stress), commercial value ( which version would sell better), and which version is easier to read ( who wants to read music in 6/16, or 4/9

)
Meter is not the most clear cut thing in the world so it is understandable that people get confused. Even the great Beethoven wrestled over his choice of meter. In the the 2nd movement the Scherzo, the performers had difficulty performing it because the quarter-notes blazed past their Eyes. Beethoven wrestled again using a compound meter because traditional values was to write in 3/4. So he found a way to write the piece by grouping the measures into groups of 4. He could have written it in 12/8 or 12/4 meter but he did not want to break tradition.
I am not trying to give a history lesson, my point is as revolutionary as Beethoven was, he was human like all of us and struggled with meter and sometimes the choice of meter is not a "magical musical " reason but many factors that go into choosing a meter.
Hopefully you can see why I didn't want to go to far in to music theory, because it can become confusing very quickly. I don't know everything about meter (obviously with my earlier mistake about 6/8)but I am always willing to learn more. I am just speaking about what I experienced and read somewhere. Hopefully you can see why I didnt want to go to far down a dark road because I am sure the original poster is completely confused by now.
