aubrey played a french-type horn (a “raoux horn”) which had a narrow-bore (the tube was very narrow). the german-type horn had a wider bode and made a slightly different sound. playing on a raoux horn there was more risk of a note cracking (not speaking properly). the german-type horn was becoming very popular in england, but aubrey insisted that all the horn players in the bbc symphony orchestra continued to play on raoux horns. aubrey was a very skilled musician in chamber music and made a recording with the violinist adolf busch and the pianist rudolf serkin of the brahms horn trio. it sold many copies and continued to sell for many years until the 78rpm records were replaced by long-playing records.