pˈɑːsᵻbli, ðə tˈuːn wʌzɐ sˈɪɡnəl tə ðə fɹˈɛntʃ ˌʌndɚɡɹˈaʊnd ɔːɹ sˌʌm ˈʌðɚ ɡɹˈuːp ɪn dʒˈɜːmənhˈɛld tˈɛɹɪtˌoːɹi.
Possibly, the tune was a signal to the French underground or some other group in German-held territory.