Acoustic guitars have a bridge with six holes that will lead to the inside of the guitar.
-Remove the current string and pop out the bridge pin.
-Insert the end of the new string that has a ball inside the hole that held the bridge pin.
-Wedge the bridge pin firmly back into the hole with the slot facing towards the nut.
-Pull out as gently as possible on the strings until the ball rests against the bottom of the pin. Leave your thumb on the pin to ensure that it does not pop out or disappear.
-Test the strings by gently tugging on it. If you do not feel the string shift, the ball is snug against the bridge pin which means you are ready too secure the string to the tuning post.
Step 2: Putting the strings to the tuning post.
You should now be focusing your attention on the headstock. To attach a treble string to the tuning post,
-Pass the string through the hole in the post. You must ensure that you leave enough string slack between the bridge pin and the post to allow yourself to wind the string around the post a couple of times.
-Crease the metal wire toward the inside of the guitar.
-While keeping the string tight against the post with one hand, wind the tuning peg clockwise with the other hand. While doing this, it is very important to keep your eyes on the post to ensure that as the strings wraps around the post, it winds down, towards the headstock surface. Also be sure that the strings do go into the correct slots of the nut.
To attach a bass string, follow the exact same steps except that you wind the strings counterclockwise so that the string goes up the middle and goes over the post to the left.
Tip: if you find that you have left too much slack, unwind the string and start again, kinking the string further down. If you do not leave enough slack, your winding does not go all the way down the post and may result in slipping if the string does not have enough length to grab firmly around the post.
