[Like all esoteric brass instruments, the keyed trumpet has a major following in Britain. This web site is sort of amazing – whoever wrote the text of the front page did everything in his or her power to make you follow the link to the rest of the site.]
The keyed trumpet never gained traction, despite the concertos written for Weidinger by Haydn and his successor at the Esterházy court, Johann Nepomuk Hummel. The instrument was said to have sounded like a “demented oboe”. The English trumpeter Crispian Steele-Perkins, one of the few contemporary champions of the instrument, does at least as well as that in his recording of the Haydn Concerto: