Open the blank cassette's case by removing the four screws.

Remove the two large wheels in the cassette body. Push the roll of magnetic tape off of the wheel. Then, cut the magnetic tape from the wheels using an exacto knife.

Cut a piece of magnetic tape that is approximately 8 5/8 inches long.

Join the two ends of the tape together using cassette splicing tape. Place the tape on the inside of the loop.

Run the magnetic tape loop through the bottom of the cassette tape housing. Finish installing the loop by placing the loop over the wheel on the right.

Replace the wheel on the left inside the cassette housing. Close the housing with the four screws. Now you're ready to record a loop!