As in other periods, instrumental technique was developed in the romantic era. This was a trend that was begun by Ludwig van Beethoven's Third Symphony, the Eroica, and continued through the period. Composers such as Hector Berlioz orchestrated their works in a way hitherto unheard, given a new prominence to wind instruments. Instruments previously rare, such as the piccolo and cor anglais, came to be parts of the standard symphony orchestra, and the orchestra as a whole grew. Gustav Mahler's Symphony No. 8 is known as the Symphony of a Thousand because of the large number of people required to perform it.
In addition to using larger orchestral forces, works in the Romantic era tended to become longer. A typical symphony by Haydn or Mozart will last twenty to twenty-five minutes; Beethoven's Eroica, once again, will last at least forty-five minutes, a significant increase; some of Beethoven's later symphonies are even longer. The trend towards long, large scale works which require substantial orchestral forces probably again reached its peak in the later symphonies of Mahler.
The instrumental virtuoso also became more prominent. The violinist Niccolo Paganini was one of the musical stars of the early 19th century, his fame usually put down as much to his charisma as his technique. Franz Liszt was also a very popular virtuoso pianist. Typically in the 19th century, virtuosi such as these were more likely to attract an audience than was the presence on the program of the music of some particular composer.
Romanticism in music, in the end, represented a trend that made larger and larger demands on the orchestras playing it, on individual performers, and on the listeners. These trends tended to more sharply distinguish what we have come to call "classical music" from "popular music."





