Sitar is perhaps the most well known of the Indian instruments. Artists such as Ravi Shankar have popularized this instrument around the world. Sitar is a long necked instrument with an interesting construction. It has a varying number of strings but 17 is usual. It has three to four playing strings and three to four drone strings. The approach to tuning is somewhat similar to other Indian stringed instruments. These strings are plucked with a wire finger plectrum called mizrab. There are also a series of sympathetic strings lying under the frets. These strings are almost never played but they vibrate whenever the corresponding note is sounded. The frets are metal rods which have been bent into crescents. The main resonator is usually made of a gourd and there is sometimes an additional resonator attached to the neck.
Sitar is used in a variety of genre. It is played in north Indian classical music (Hindustani Sangeet), film music, and western fusion music. It is not commonly found in south Indian classical performances or folk music.
The sitar developed during the collapse of the Moghul empire (circa 1700). It reflected the culture of the times in that it showed both Indian and Persian characteristics. (go to "Origin of the Sitar" for a better description.)
The sitar is of a complex construction. It is crafted of natural materials by extremely talented and well trained craftsmen. (go to "Parts of the Sitar" or "Making the Sitar"for a better description.)
There are a number of options in tuning and stringing the sitar. Even the same instrument will be tuned differently from piece to piece, according to the requirements of the rag. A good description of the various tunings and stringing options is to be found in "Sitars Etc - Sitar Tuning Guide".
The technique of the sitar is very involved. It is certainly advisable to have a teacher. However a good introduction to the basic technique is to be found in "Peter Cutchey's Online Sitar Tutorial".
George Harrison's sitar-lesson with Ravi Shankar
Sitar by Hindraj
Anoushka Shankar on Sitar
Pt. Sanjoy Bandopadhyay: Puriya Kalyan [rare variety] on sitar
Sanjay Guha - sitar
Indrajit Banerjee: Sitar - Bhairavi Dhun
Ravi Shankar - The Art Of The Sitar