4(2flpic).3(1cor ang).4(1clpic, 1clB).3(1cbn) - 1 sarrusophone - 4(ou 8).4.3.1 - 3perc, 1timb, 1cel, 1pno, 2hp - 1 cythara do arco (ou 1 violinophone), 1viole d'amour - crdBesides the orchestra taking up the full stage, there are a few interesting items here.
The Sarrusophone is a band instrument with the range similar to a saxophone.
The violinophone is also called the Stroh violin (referred to by Eschig as a cythara do arco). The Wikipedia article doesn't mention any use by classical composers, though the instrument was apparently in vogue in Buenos Aires in the 1920s. This is another example (along with the use of a prepared piano in Choros #08) of Villa-Lobos being ahead of the curve technology-wise.
Just to make it difficult for orchestras to revive this piece, Villa-Lobos added a viole d'amour to the score. It all wasn't enough to keep it off the stage in Albuquerque and Brussels, and there are