Yeah, Chris; Alan was surprisingly ambivalent, even wishy-washy, in describing his feelings about the piccolo.

There aren't any triangle concertos, and its use in classical music is intermittent. It can be mentioned though, that Liszt's use of it in his Piano Concerto No. 1 gave the influential critic Hanslick ammunition to denounce it as being a triangle concerto rather than a piano concerto.

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Enjoy the music, not the equipment.