These are based on a technique from African Drumming. When you play a polyrhythm such as say 4:3, you can shift the rhythms so that the two rhythms meet each other at different places in the measure, not just at the measure beat. This creates a syncopated effect - a feeling that you are playing "off the beat".

These videos explore that idea further, also using an idea from Eastern European music to emphasize e.g. 8 beats as 3 + 2 + 3. You might also like these same rhythms with percussion.

Melody, or rhythm, ambiguity

When slow you may hear melodic phrases with harmonies. As the rhythms get faster you may begin to hear individual parts as independent rhythms. Sometimes you find that you join the same pitches together linearly to make rhythms and sometimes they join together with other parts to make melodic patterns. This ambiguity is what I particularly like about these syncopated, beat shifted, harmonic metronomes. 

Play list of all the rhythms

On youtube (lets you start at any of the videos in the list)

Use these videos as a resource

You can use any of these videos as a resource for your own website or wikis, or make more of them yourself - see Add videos like these to your own site

Play these rhythms and animations at any tempo with Bounce Metronome

You can use Bounce Metronome Pro to practise these and many more rhythms at any tempo, including changing tempo. 

For these rhythms see the Harmonic Polyrhythms feature.