For some Everett Kaser Software games, different musical themes can be chosen.
The following is a list of the music files in these games.

 Filename        Music
 --------        -----
 bachbrc3.mid    Bach's Brandenburg Concerto #3 (1st movement)
 bachc147.mid    Bach's Cantata #147 (Jesu, Joy of Man's Desiring)
 bachov3 .mid    Bach's Overture (Suite) #3 (Air)
 bachtfd .mid    Bach's Toccata and Fugue in D minor
 beetfure.mid    Beethoven's Fur Elise
 beetmsc .mid    Beethoven's Moonlight Sonata in C# minor (Adagio sostenuto)
 beetsym5.mid    Beethoven's Symphony #5 (1st movement)
 beetsym9.mid    Beethoven's Symphony #9 (2nd movement)
 chopminw.mid    Chopin's Minute Waltz
 chopvalc.mid    Chopin's Valse in C# minor
 debuclai.mid    Debussy's Clair de Lune
 haydsond.mid    Haydn's Sonata in D (1st movement)
 mendwedm.mid    Mendelssohn's A Midsummer Night's Dream (Wedding March)
 mourprem.mid    Mouret's Premier Suite (Masterpiece Theater Theme)
 mozasere.mid    Mozart's Serenade "Eine Kleine Nachmusik"
 mozasona.mid    Mozart's Sonata in A (Rondo-Alla mrka)
 mozasonc.mid    Mozart's Sonata in C K.545 (Allegro - 1st movement)
 musspict.mid    Mussorgsky's Pictures at an Exhibition (Promenade)
 ravebole.mid    Ravel's Bolero
 rosswtov.mid    Rossini's William Tell Overture
 schumm3f.mid    Schubert's Moments Musicaux #3 in F minor
 schuscen.mid    Schummann's Scenes From Childhood (Traumerei)
 straalso.mid    Strauss' Also Sprach Zarathustra
 strablue.mid    Strauss' The Beautiful Blue Danube
 tcha1812.mid    Tchaikovsky's 1812 Overture
 tchaflow.mid    Tchaikovsky's Nutcracker Suite Waltz of the Flowers
 tchaplum.mid    Tchaikovsky's Nutcracker Suite Dance of the Sugarplum Fairy
 tchareed.mid    Tchaikovsky's Nutcracker Suite Dance of the Reed Pipes
 viva4sea.mid    Vivaldi's The Four Seasons
 wagnlohe.mid    Wagner's Lohengrin (Bridal Song)

The MESH: Hero music is MOZASONA.MID from the above list.
The Descartes Enigma music is BCHTC150.MID from the above list.

The Sherlock for Windows music, not listed above, is Ecossaise, by Beethoven.