Romani Music

A big part of Romani culture is their music. "Gypsy Music" (which is considered a derogatory term for the Romani) has several influences due to the gypsies nomadic lifestyle. It has Indian roots, but also traced elements of Greek, Arabic, Persian, Turkish, Serbian, Czech, Slavic, Romanian, German, French, and Spanish musical forms.

One can't really say Romani music sounds a certain way because it varies in harmonic, rhythmic, melodic,  and formal structures from region to region. Since there are various dialects of the Romani languages, songs are usually sung with multiple variations of Romani dialect. Often too, the songs are performed with a dance because Romanis are commonly entertainers. 

Romani music was originally folk music. It's pretty rare now-a-days to here gypsies play or perform this type of music just because each country that adopted Romani music has altered its sound to be more pleasing to its audience. Per example, for Spain you have flamenco, yet in Romania, you have slower funeral/wedding music. It serves different purposes depending on the country of which it is being performed. 

Also something to note is that Romani music is more of an Eastern European genre. However, Western Europe has had performances by Gypsy Orchestras, and adopted music that they call "Gypsy Jazz." This particular form of music is very iconic in Romani culture, possibly some of their best work.