My mother gave me my first piano lessons when I was six years old. My father, who was the head of an agricultural school, was gifted musically and active in many directions. ... I was eight years old when I lost him. After his death my mother had to work as a schoolmistress and struggle hard for our daily bread. ... I began writing piano music when I was nine years old and made my first public appearance as a “composer” and pianist at Nagyszöllős in 1891. ...

In my studies of folk music I discovered that what we had known as Hungarian folk songs till then were more or less trivial songs by popular composers and did not contain much that was valuable. I felt an urge to go deeper into this question and set out in 1905 to collect and study Hungarian peasant music unknown until then. It was my great good luck to find a helpmate for this work in Zoltán Kodály, who, owing to his deep insight and sound judgment in all spheres of music, could give me many a hint and much advice that proved of immense value. I started these investigations on entirely musical grounds and pursued them in areas which linguistically were purely Hungarian. Later on I became fascinated by the scientific implications of my musical material and extended my work over territories which were linguistically Slovakian and Rumanian.

The outcome of these studies was of decisive influence upon my work, because it freed me from the tyrannical rule of the major and minor keys. The greater part of the collected treasure, and the more valuable part, was in old ecclesiastical or old Greek modes, or based on more primitive (pentatonic) scales, and the melodies were full of most free and varied rhythmic phrases and changes of tempi, played both rubato and giusto. It became clear to me that the old modes, which had been forgotten in our music, had lost nothing of their vigour. Their new employment made new rhythmic combinations possible. This new way of using the diatonic scale brought freedom from the rigid use of the major and minor keys, and eventually led to a new conception of the chromatic scale, every tone of which came to be considered of equal value and could be used freely and independently.

Bartók, “Autobiography” (1921), in Béla Bartók Essays, ed. Benjamin Suchoff (London, 1976), 409–410