Editing Sympathetic string (section)

[[File:Midtdetalj.jpg|thumb|[[Hardanger fiddle]], showing sympathetic strings underneath playing strings]]
[[File:Sarangi close-up crop.jpg|thumb|Detail of a sarangi, showing its sympathetic strings under three playing strings]]

'''Sympathetic strings''' or '''resonance strings''' are auxiliary strings found on many [[Music of India|Indian]] musical instruments, as well as some Western [[Baroque music|Baroque]] instruments and a variety of folk instruments. 

They are typically not played directly by the performer (except occasionally as an effect), only indirectly through the [[Tone (musical instrument)|tones]] that are played on the main strings, based on the principle of [[sympathetic resonance]]. 

The resonance is most often heard when the [[fundamental frequency]] of the string is in unison or an [[octave]] lower or higher than the catalyst note, although it can occur for other [[interval (music)|intervals]], such as a [[perfect fifth|fifth]], with less effect.