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Polyrhythms or Cross Rhythms Metronome
Intro - What it sounds like - Video clips - Screen Shot - Screen shot for 2, 3, 5 and 7 beats to the bar - 3D Animations
If you clap three beats to a measure, and your friend claps four beat in the same time as your three beats, you are playing a polyrhythm. Or you can play both parts yourself.
Or play 3 beats played simultaneously with 5, or 2 with 3 with 5 etc.
If that's what you want to practice, this is just the metronome for you.
Some musicians, e.g. drummers and organists, may be able to play four such rhythms simultaneously, e.g. a single drummer playing four rhythms at once (each hand and each foot playing a separate rhythm). Polyrhythms are very common in African drumming and in Indian music and the African Pygmies are particularly noted for their polyrhythms, also the composer Ligeti who was influenced by Pygmie music.
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Video clips - What it looks like played full screen
This shows 5, 3 and 7 beats per measure played simultaneously, each with 2 subdivisions.
For more videos see the Polyrhythms Videos page
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Screen Shot (doesn't play notes)
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The bouncing balls bounce in opposite directions for the polyrhythms - this makes it easier to distinguish the bounces for the different rhythms by eye.
As with the Basic Metronome, you can accent or unaccent beats with RIGHT CLICK, skip beats with LEFT CLICK, adjust beat volumes with MIDDLE CLICK or SHIFT + LEFT CLICK. For details see the page about the Basic metronome.
You can also adjust timings of individual beats, practice with a gradually changing tempo, or add a lilt to the bar timings. For more about this see the page about the Pro metronome.

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Screen shot for 2, 3, 5 and 7 beats to the bar
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When you have many rhythms played simultaneously, then it can help distinguish the bounces if you split the display up into several sections with two rhythms only in each section (or you may prefer to have just one rhythm in each section).
You can set the number of bouncing balls per section in the Bounce Preferences (Ctrl + 220) window.
Here is what it sounds like: 2 with 3 with 5 with 7 / 4 - polyrhythm

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3D Animations
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For 3D animations of the polyrhythm 3/4 with 4/4, see the 3D Metronome page.

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