Brilliant brass folk band impresses with their polka about the jolly 60s

The brass band da Blechhauf'n has been in existence for more than 20 years now and has made a name for itself in the brass music scene, especially in Austria and Bavaria. They also try to expand the canon of brass music and play not only marches, polkas, waltzes and arrangements of film or pop music. They also play their own compositions of jazzed-up brass music or arragements of classical music, and there is also a lot of comedy and slapstick when they're on stage.
The group consists of Reinhold Bieber (trombone/bass trumpet), Philipp Fellner (trombone), Christoph Haider-Kroiss (trumpet/flugelhorn), Bernhard Holl (trombone/Styrian harmonica), Dominic Pessl (trumpet/flugelhorn), Albert Wieder (helicon) and Christian Wieder (trumpet/flugelhorn).
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Song title: Die fidelen 60er
Performance: da Blechhauf'n
Excerpt from the show "Klingendes Österreich" from 09.06.2018
Place: "At the borders" Styria - Hungary - Burgenland

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Ну это понятно - геликон.
А это, какие то альпийские горны?