I'm looking for a piece of choral music that I once stumbled upon on Youtube, but for the life of me can't find again. It was
for unaccompanied mixed chorus
might or might not have been by Jaakko Mäntyjärvi
starts with a 3-5 note sound effect imitating a the classic American train whistle - presumably realized via complicated dissonant parallel clusters or mixtures, certainly eerily accurate.
Anyone here who has performed that piece, or remembers the recording?