This is the normal default search, and can access every piece in the catalog. You can search on genre, feel, or any word found in the entry for that piece of music. For example, you can type in "Banjo" to find anything with a banjo in it.
This section does not include every piece of music, but does make it easier to quickly find pieces that are, for example "Comedic" or "hard rock".
All the names of every piece ever available on incompetech, sorted by creation date (more or less).