Add
You can use functions such as yellow arrows to perform arithmetic functions such as adding subtracting etc
Make sure the inputs are controls and the outputs are indicators.
Add arrays you can also perform the function on many rows of data
Connecting a CD player to your sound card
Earphones out to microphone jack in on the computer
Making a subVI
Go to the front panel
Right Click on the upper right hand icon
Select Show connector
Using the wiring tool select the section in the sub VI and then select the section on the front panel that matches
To make an array
Rt click on the box on the gray box
Create
Fourier transformations