technique." Indeed, Reicha's experiences as a flautist must have helped in the creation of these pieces, in which he systematically explored the possibilities of the wind ensemble and invented an extended sonata form variant that could accommodate as many as five principal themes. Reicha wrote his first experimental quintet in 1811; the 'incomparably superior' first two of the later published quintets of Opus 88 were written by 1814 after further study of the instruments and collaboration with his players, with the remaining four completed before publication in 1817. Three further sets of six were published as Opus 91 in 1818, Opus 99 in 1819 and Opus 100 in 1820. Musically, the wind quintets represent a more conservative trend in Reicha's oeuvre when compared to his earlier work, namely the compositions of the Viennese period. In the quintets, as he describes in his preface, Reicha wanted to expand the technical limits of the five still evolving wind instruments (hand horn, 'un-rationalised' flute and clarinet, double reeds with fewer keys), and thereby also the ambitions of amateur wind players, by establishing a nucleus for a corpus of substantial work like that available to string players (and consciously more serious than the Harmoniemusik of the last century). His writing combines virtuoso display (often still very challenging today, yet idiomatic for each instrument), popular elements (from the comic opera his soloists played, from his Bohemian folk heritage, from the military background to his life – many marches, 'walking' themes and fanfares), and his lifelong more academic interests in variation form and counterpoint. Four of the quintets have trios in passacaglia form, the repeating theme however being on different instruments in each case so not necessarily in the bass. The earlier Beethoven connection, now severed, is revisited in the scherzo of the quintet in E-flat Op. 100 no. 3, which contains clear musical quotations (most obvious in the horn part) from both the scherzo of his Eroica (also in E-flat major) and the first movement of his 5th symphonies. Berlioz says the quintets "enjoyed a certain vogue in Paris for a number of years. They are interesting pieces but a little cold", while Louis Spohr, who was visiting Paris in 1820–21 and reserved judgment until he had heard several performed, assessed them in a letter home (which he included in his autobiography) as having too many ideas linked carelessly or not at all ("were he