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Thread: Rewriting in a New Time Signature

  1. #1

    Rewriting in a New Time Signature

    Hi!

    I'm doing homework. I have to write a rhythm in a new time signature, without changing the effect.

    The question: In a 6/8 rhythm, there are 1 dotted crochet and 3 quavers in a bar. The new time signature is 2/4. All I have to do is making them into triplets, right? The 3 quavers are bracketed into a triplet. And how about the dotted crochet? How to change it into a triplet?

    Thanks!

  2. #2
    Ow! is the dotted crochet changed into....a crochet? no triplet? :/

  3. #3
    Registered User JonR's Avatar
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    Quote Originally Posted by chitarrista View Post
    Ow! is the dotted crochet changed into....a crochet? no triplet? :/
    Yes, it's simply a crotchet.

  4. #4
    Quote Originally Posted by JonR View Post
    Yes, it's simply a crotchet.
    Ah, thanks, Jon!

    There are 2 pages full with questions like this, from and to various time signatures. Most of them need to change into triplets. I was having fun (falalalala...) writing number 3 in a bracket, so I automaticly wanted to write 3 on top of the dotted crotchet too...hehe...

  5. #5
    Registered User JonR's Avatar
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    Quote Originally Posted by chitarrista View Post
    Ah, thanks, Jon!

    There are 2 pages full with questions like this, from and to various time signatures. Most of them need to change into triplets. I was having fun (falalalala...) writing number 3 in a bracket, so I automaticly wanted to write 3 on top of the dotted crotchet too...hehe...
    OK; make sure (in the 2/4) it is a crotchet, not a dotted crotchet .

  6. #6
    Jonnnn...!

    Found this on the 3rd page...what should I do with the first and the last note?

    Thank you!
    Attached Images Attached Images

  7. #7
    Yikes! the attachment is too big! >.<' how can I edit it? Sorry!

  8. #8
    Registered User JonR's Avatar
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    No idea how to make the attachment smaller.
    As for the note - I don't know either. As it just says "etc", there's no clue as to what might follow. Presumably it's part of another triplet, so another bracket with a "3", reaching beyond the note would seem the best solution. I don't think it will matter much, as you've got the right idea with the main bar. (No actual piece of music would have one note and then an "etc" .)

  9. #9
    Haaa...a 3 in a bracket reaching beyond the note seems a great idea for the last note. Thanks, Jon!

    Now I gotta find out a great solution to write the first note

  10. #10
    Got something, just in case anyone out there is interested.

    The original melody is 12/16, meaning the first note, the 1/16th note = 1 count.

    The result melody is 4/8, the first note has to be 1 count too. 1 count in the 4/8 is 1/8th note.

    What do you think?

  11. #11
    Registered User JonR's Avatar
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    Quote Originally Posted by chitarrista View Post
    Got something, just in case anyone out there is interested.

    The original melody is 12/16, meaning the first note, the 1/16th note = 1 count.

    The result melody is 4/8, the first note has to be 1 count too. 1 count in the 4/8 is 1/8th note.

    What do you think?
    In 12/16, the count is 4 to the bar, same as in 4/8.

    The difference is the beats in 4/8 are 8th notes. In 12/16, the beat is a dotted 8th (equivalent to 3 16ths).

    IOW, in 4/8, the beats simply divide in half to become 16ths. So if each beat divides into 3, that's when you need the "3" triplet sign.

    In 12/16, each beat already divides into 3, so the "3" is not needed.

    Of course, 4/8 with triplets sounds identical to 12/16. Which time sig is chosen would depend on how much of the music has that triplet feel, and how little is in duple time. Generally, unless the triplet feel goes all the way through, 4/8 would be chosen, with triplet markings where necessary.
    It's rarer to have the opposite: a compound time feel with occasional duplets. IOW, 12/16, with a few bars of 8 equal 16ths; than each beat (pairs of 16ths) would be bracketed with a "2" above.

    (And btw, both time sigs are rare. 4/4 and 12/8 would be a more common comparison.)

  12. #12
    Jon, thanks for the explanation, though I must admit that I had to read over and over again. Must be my English! Hehe

    And just to make sure...is the first note of the melody in 4/8, a 1/8th note?

  13. #13
    Quote Originally Posted by chitarrista View Post
    Hi!

    I'm doing homework. I have to write a rhythm in a new time signature, without changing the effect.

    The question: In a 6/8 rhythm, there are 1 dotted crochet and 3 quavers in a bar. The new time signature is 2/4. All I have to do is making them into triplets, right? The 3 quavers are bracketed into a triplet. And how about the dotted crochet? How to change it into a triplet?

    Thanks!
    You simply write the dotted crochet (quarter note) inside the triplet brackets!


    Maybe some pictures would be nice

  14. #14
    Registered User JonR's Avatar
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    Quote Originally Posted by theharm View Post
    You simply write the dotted crochet (quarter note) inside the triplet brackets!
    Sorry, no - it's just written as a crotchet. It's one beat in 2/4, and there's no need to link it with a triplet feel, unless the beat is divided.

  15. #15
    Registered User JonR's Avatar
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    Quote Originally Posted by chitarrista View Post
    Jon, thanks for the explanation, though I must admit that I had to read over and over again. Must be my English! Hehe

    And just to make sure...is the first note of the melody in 4/8, a 1/8th note?
    In your example, the very first note - F, a 1/16th in 12/16, the pickup note right before the first barline - becomes 1/3 of a beat if written in 4/8.
    That means you need to show the whole beat of which it is a part.
    So the notation should begin with an 8th note rest and then the 16th note, bracketed together under a "3" triplet bracket.

    An 8th note in 4/8 is equivalent to a dotted 8th in 12/16. Both represent one beat, 1/4 of the bar.
    Last edited by JonR; 09-29-2012 at 11:03 AM.

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