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.
Can anyone tell me what adapter I need to hook up my stereo speakers to my PC? I was going to use the stereo speakers hooked up to the receiver, then somehow buy an adapter/cord and plug it in the back of the receiver to my PC.