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.
Step 1. Insert the SD card into your computer's card reader with the metal contacts pointing away from you. If you don't have a card reader, insert the SD card in another device, such as a cell phone or digital camera, that supports USB mass storage. Connect the device to your computer with a USB cable.