This is a reading of the sirens episode, number 11, in James Joyce's Ulysses.  There are three layers to the piece. Foremost is the text itself. The second one is a through-composed piece entitled "Butes." 

The mythological character that most ardently gave into the song of the sirens serves as a kind of background soundscape. 

The third layer is the free improvisation on guitar, which is heard in its entirety twice, as a loop, but also one time through, altered, as a stretched slower companion piece. The human voice has been altered purposefully in order to make it faster and more artificial.

-- Jaime Rodriguez Matos