These click tracks will put your timing to the test by dropping out for short sections. When the click comes back you better hope you haven't sped up or slowed down!

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First you get a 2 bar count in then 16 bars to get settled. The next 16 bars have 3 bars with click and the 4th without. After that, 16 bars of 2 on - 2 off, then 4 on - 4 off.

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When you get better at grooving though these, try playing fills in the bars where the click drops out.