In Eastern Moravia and districts still further east, we find a special type of rhythmical accompaniment in folk dance-music, performed by second fiddle and bass in a string ensemble. Each bow-stroke (both down and up) regularly combines two rhythmic values with the accent on the second element. Two bow-strokes, first down, then up, correspond to a single two-four bar. Variant types of this accompaniment are also found in Hungarian and Rumanian folk music. In some districts in Slovakia, it is referred to as duvaj, perhaps an attempt to express its character onomatopoeically.

The duvaj-accompaniment has distinctive characteristics in each district. This is clearly shown by the optical recordings of changes in sound intensity (Fig. 1). The first example (upper tracing of five bars) comes from Eastern Slovakia (Vyšné Raslavice); the second (lower tracing of eight bars), is from Central Slovakia (Hrochot pod Polanou). In the second example, irregular sub-division within the bar is shown.