Romanian musicologist, Constantin Brăiloiu, termed the Danubian asymmetric rhythm dances rhythms as “aksak” using Turkish medieval music terminology, but only the term is borrowed and it does not indicate a Turkish origin for these dances. These rhythms use beats of unequal length, the long beat being around 1½ times the length of the short beat.
There are many features of Romanian folklore that are common to both the Romanian and Bulgarian sides of the Danube. These uneven rhythm dances are part of this shared tradition.
Asymmetric dance rhythms are used in the southern regions: southern Moldavia, Dobrogea, Muntenia, Oltenia;
- Rustemul has two beats, short-long, usually written in 5/16. The timing is not perfectly in 5/16 (2+3), sometimes it will drift nearer to 3/8, and in some areas it loses the asymmetry, becoming close to 2/4.
- Geampara has three beats, short-short-long, written as 7/16 (2+2+3), and is found in Dobrogea and the Danubian plain in south east Romania.
- Șchioapa is notated as 9/8 (2+2+2+3) but has a four beat rhythm; short-short-short-long. The southern Moldavian Șchioapa, southern Transylvanian Hodoroaga and East Serbian Vlach Sokcili have a musical rhythm of 5/4 (2+2+2+4) and similar choreography.
- In Dobrogea 9/16 (2+2+2+3) has all 9 notes played, is known as Cadâneasca and closely resembles the Bulgarian Daichovo.
- There are some compound rhythm dances from Dolj county in southern Oltenia, such as Tepeșul and Dianca.