In many movies, the former first voice constitutes the fundamental core for the understanding of the plots, going hand in hand with the musical second voice to enhance the moods, the characters, as well as their actions and emotions in the scene. In some occasions, however, this easily neglected musical voice moves against the moods and actions, or at least voicing independently from the dramatic context of that particular scene. In such momentary instance, the music is creating an "other" or "new" voice, expressing a new level of meaning to the audience. Is there any subliminal messages concealed behind the scene? At this time, the "other" voice is creating an expectancy of the forthcoming plots for the audience to speculate. How can this expectation be realized in the later scene? Such an emotional suspense is one of the sources of artistic pleasure. As such, the meaning of the "other" voice is often a trigger for aesthetic contemplation.
Compared with the voice crying out from the uneasy, embarrassed conversation among Ilsa, Rick and others, the eerie second voice ("As Time Goes By") murmuring behind seems more important for one to reveal the subliminal message between Ilsa and Rick. Are they previously known to each other? Is Rick the protagonist of Ilsa's recollection? If that so, does such a distorted tune aim to herald a message that the love between Rick and Ilsa doomed to be a failure? Is their falling in love only a ‘distorted’, yet beautiful, illusive memorable dream even in the beginning of their first acquaintance? Here, this "other" voice of the now-famous love theme has already disclosed Ilsa’s sorrowful but unforgettable story to some extent to the audience.