Here is a instrument I made by taking apart an old casio keyboard and tying a copper wire between two tiny screwdrivers and touching solder points that were never meant to be connected. If you've never done this and you have an old keyboard around, give it a try.

I've mapped the low bass sound to outputs 3-4 and the tapping sounds at the top of the keyboard to 5-6.

Below is an example of this instrument in use. Some effects and liberal use of the cutoff filter on the ESX24.

You can import these samples into your preferred sampler as well - they are .aif format.