-Get a text editor
You can use Notepad (it should be a default program on most computers), but I would highly recommend getting Notepad++. It is free to download and has a lot of little quality of life features that make ini editing easier.

-Go to the mod folder
Default location is:

-Open the Config folder

-Open the XComContent.ini with your text editor

-If you are using the default Notepad, select the line that you would like to turn off. Place a semicolon (;) in front of the plus sign (+). This will comment out the selected line. This method will only comment out one line at a time.

This is an example of a commented out Turian male line:

-If you have Notepad++, you can use the method mentioned above or you can simply highlight the line or lines that you would like to comment out then under the Edit tab go to Comment/Uncomment then to Single Line Comment (or Ctrl+K by default). Notepad++ allows you to comment out multiple lines at once and commented lines will appear green.

-Comment out lines to fit your preference
Each section has four lines that refer to normal soldiers, reapers, skirmishers and templars (in that order). Therefore, if you only want the turian voice for skirmishers, you can comment out the other three lines so that only the turian voice for skirmishers remains unaffected.

-Save your edits (Ctrl+S by default)

-Open you XCOM 2 game and go into the Character Pool to make sure your ini edits took affect/make sure you didn’t comment out a line by accident.