How to store audio files in server (during hosting)
Your file system should have backup and recovery procedures setup if this data is important. (The rest of the application is backed up right?). So you shouldn't use a database just for the backup and restore capability.
Storing the files outside of the database allows you to separate your database and file servers which will be a plus on the scalability side.
I would definitely go for Filesystem. storing and deliviring (large) files is exactly what it was made for.