The sound files are
bother_father_slow.wav
bother_father_slow.mp3.
The vowel sounds are deliberately greatly prolonged.
The text is
Bother, father caught hot coffee in the car park.
The formant-analysis file is
bother_father_slow_formants.gif
The relevant AUE thread contains
Message-ID:
<7522-1080153728@host102-ursus.spray.net.pl>.