which instruments are used for this?
Several instruments are used such as "zampogna" bagpipe,  string, wind and percussion, clarinet, accordion, violin and small drums, adorned with bells
Music of Italy
 Many Italian instruments are tied to certain rituals or occasions, such as the "zampogna" bagpipe, typically heard only at Christmas. Italian folk instruments can be divided into string, wind and percussion categories. Common instruments include the "organetto", an accordion most closely associated with the saltarello; the diatonic button "organetto" is most common in central Italy, while chromatic accordions prevail in the north. Many municipalities are home to brass bands, which perform with roots revival groups; these ensembles are based around the clarinet, accordion, violin and small drums, adorned with bells.
what is italy's gift to the world of music UNANSWERABLE what is this music refers to? : Italian folk music is an important part of the country's musical heritage, and spans a diverse array of regional styles, instruments and dances does it have any political connection? Music and politics have been intertwined for centuries in Italy is there any festival dedicated for this? Yes, Venues for music in Italy also called  international music festivals each year
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Music of Italy [SEP] Instrumentation
Instrumentation is an integral part of all facets of Italian folk music. There are several instruments that retain older forms even while newer models have become widespread elsewhere in Europe. Many Italian instruments are tied to certain rituals or occasions, such as the "zampogna" bagpipe, typically heard only at Christmas. Italian folk instruments can be divided into string, wind and percussion categories. Common instruments include the "organetto", an accordion most closely associated with the saltarello; the diatonic button "organetto" is most common in central Italy, while chromatic accordions prevail in the north. Many municipalities are home to brass bands, which perform with roots revival groups; these ensembles are based around the clarinet, accordion, violin and small drums, adorned with bells.