Tim Horwood adds to Janos Gereben:

>>...  Boder, who will conduct the Oct.  29 premiere, spoke about the
>>"complicated score...  sounds you never heard in an opera house before...
>>a large percussion group, with car horns, paper bags"
>
>Actually Havergal Brian's opera The Tigers calls for a motor horn though
>the opera has never been staged.

And don't forget Gershwin's An American in Paris, with the taxi horns.

Steve Schwartz