Here is an similar question here on SO with further information and references how you could save images and audio in MySQL.
BUT IT'S NOT RECOMMENDED
Each file will have a few MB, so your MySQL Database will grow pretty big.
As @ksealey mentioned in the comments you need to store the path to the saved file in the database, this is best practice for MySQL Databases and the common way to do it.
Instead of hardcode the path to the file you just refer to the database entry for the images and audios.