Specs on the machine you are using & the radio you are using? Is the audio input connected to a microphone port or line-in port on the computer? Does adjusting the input level (from radio and from the computer) make any difference? If you enable source audio monitoring on your computer is the clicking heard through the computer speaker?
Using windows 7 computer with a regular sound card. The radio I'm using is a g5 with a amplified charger. The back of the charger has a audio out jack. That's where I'm plugged into. Using the g5 I have to use the charger Because it has an audio out Jack
You'll need a BT ver 2.1 reciever. They can be found anywhere. Most all are powered by micro usb. They are cheap. Check Amazon, they have bunches of different ones to choose from.