Consider the IDs like TV channels. If you want to watch a certain show, you have to tune in to the right channel. If the sampler is on the right channel, its will sense the data coming in and respond by receiving it. Easy so far. The tricky part is this.
Some devices insist on using certain IDs.
Most Zip drives give you a choice of 5 or 6. But the trick to these devices is that you can't just take them out of the box an plug them in. But don't let this scare you. It's pig-easy to set jumpers, all you have to do is read a simple diagram and stick the little plastic jumper over the right pins. Also, let me tell you now.