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.
Vista x64, to sum up, I want sound from the mic port on my USB audio card (Diamond XSTU21) going to speakers plugged into my soundmax integrated digital HD audio device. 1  I have an external audio source (a PS3) and I want to have the sound play through my computer speakers. 2  Hi Dawson,