Hold Up/Left + Select + A + B and press Start at the title screen to display Ryu and allow all music from the game to be played.

Alternatively, press Start after the title screen fades to display it again. Press Up/Left + A + B +Start to display Irene Lew and allow all music from the game to be played.

Finally, press Start after the title screen fades to display it again. Allow the screen to fade again and press Start. Press Up/Left + A + B +Start to display Ryu and Irene Lew and allow all music from the game to be played with a volume and song title display.