The basic way to calculate your maximum heart rate is to subtract your age from 220. For example, if you're 45 years old, subtract 45 from 220 to get a maximum heart rate of 175.
If you have an eighth-inch jack, all you've got to do is plug it into this port and start testing sound. 1  If you have a USB jack on the end of your microphone, most computers will have two or more USB ports on the side, or the back of the computer. 2  Simply plug the USB jack into one of these ports.
Follow these step-by-step instructions to use a memory stick. Step 1: Firstly, you need to insert the memory stick into a USB connection port on your PC or laptop. Most USB connection ports can be found on the front of PCs, to the side or at the back of laptops, and on some monitors and keyboards. To find the correct port look for the USB symbol (see right).