Perhaps a bit more info would help. What are you trying to do? Where are you stuck?

Hi Mark, it does not play, I am not sure if I have set it up right, can you help, Thanks Wendy

It was a bit temperamental, but this seems to be working:

The best way to play groove~ is with a signal. You can also use line~ if you want smooth adjustments. I'm not sure what you plan to do with this next, but definitely look at info~ if you need to do any sample selection. There is a good example in the polybuffer~ help file.

Thanks everyone for your help, it really helps :)