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# Lesson 6: Constant versus changing time, adding triplets, and duplets

Created by All Star Orchestra.

## Want to join the conversation?

• What is a movement?
• A movement is a section of the song. It's like a song in and of itself but connected to the other movements to create the whole idea of it. Like, if you had a song about winter you might have a movement about holidays and another about snow.
• At would it be possible if the actual notes were played to reveal the measure/beat/timing/tempo?
• A movement is when divide diffrent notes into a three beat or 4
(1 vote)
• Would the theme from Jaws be an example of changing time?
• I think that that would be more of an accelerando (just getting faster and faster) rather than actually changing the time signature (how many beats per measure).
• I'm still slightly confused about one thing. Are duplets like triplets, but with quarter notes instead of eighth notes?
(1 vote)
• No, it's different... we're talking about putting a "two-feel" over top of what is normally a "three-feel". For simplicity, let's think of a waltz, going ONE two three, ONE two three, ONE two three...

Do "ONE two three..." for a while like that and start tapping your foot or clapping or whatever on the ONEs. Now comes the tricky part. Tap or clap again right in-between the "two" and "three" without changing the tempo or anything. If "one-two-three" were quarter notes in 3/4 time, you are going to clap or tap on the "upbeat" or "and" of two. ONE two AND three, ONE two AND three.

When you get the feel for this, this is the general idea of a duplet, and what I mean by it being a "two feel" over top of a "three feel".

You can have much more complicated things, like 7 notes over the time of 3 beats, which is quite strange for the brain to do accurately, and more complicated things yet, but they are rare or absent in many music forms.
• I've heard about the musical harmonic series before, but I don't really know what it is. Does anyone know how to explain it? I'm trying to be a composer.
• A musical harmonic is, for example on a violin your finger doesn't push down on the string, but instead barely touches it when your up really high...so the harmonic is lets say for example, A, you would shift your fingers up and barely touching the string you make the same exact sound but up higher...hope this helped....if not clear please tell me...
• I play music and I dont know what the SFP and then a crecendo to F is and i see it in by part for a cristmas festival. Could you help me?
• why would people want to change meters in music?
• To get a different vibe. For example, if I wanted to start with a waltz, I would start with 3/4. But if towards the end I would want to get a marching kind of vibe, I would switch to 2/4. Does that help?
• why are they called half notes,8th notes and so on?
• This is because they are rhythmically considered in fractional relationships to a whole note (which we say has four beats). Thus, a half note is two beats in duration, and an eighth note is one-eighth of a whole note (eight notes fit into one whole). This relationship is true for all other notes.