Question: What instrument played by Raghunath Manet has many regional designs?

Context paragraphs:
Veena: The veena (Sanskrit: वीणा , IAST: vīṇā), also spelled as vina or beena or bina, is a multistringed chordophone of the Indian subcontinent.  It is an ancient musical instrument that evolved into many variations, such as lutes, zithers and arched harps.  The many regional designs have different names such as the Rudra veena, the Saraswati veena, the Mohan veena and others.

Sakharam Rao: Sakha Rama Rao (Sakharam Rao) is an Indian musician credited with having re-introduced the south Indian chitravina (or "gotuvadyam") to the concert scene.  However, it was his father, Srinivasa Rao, who made the pioneering effort towards the reincarnation of the chitravina in modern times.  He was an ardent music lover and an amateur artiste himself.  He started experimenting with a slide on the tanpura (a four-stringed instrument, usually used as a reference drone in Indian music).  Sakha Rama Rao was drawn to this instrument since childhood.  He was able to perceive its tremendous potential to produce high-class music.  He re-designed this instrument as a fretless veena with its usual set of seven strings - four strings on the top and three in the side for drone and rhythm.  He put in arduous practice on this instrument and gave occasional performances.  Since he was not aware of the history of the instrument, he gave it a new name - gotuvadyam.  This is because, he used to casually refer to the slide as 'gotu'.  'Vadyam', in Sanskrit and many other Indian languages, means instrument.  Thus, 'gotuvadyam' was a literal name for an instrument played with a slide.  Several decades later, Ravikiran, along with a few other scholars, studied about the origins of the instrument and eventually restored the more traditional name, chitravina.  Sakha Rama Rao was a "musicians' musician" and trained many great artists like Gotuvadyam Narayana Iyengar and Semmangudi Srinivasa Iyer.  Soon there were several others who started performing on the chitravina (gotuvadyam).

Unpitched percussion instrument: An unpitched percussion instrument is a percussion instrument played in such a way as to produce sounds of indeterminate pitch, or an instrument normally played in this fashion.

Kacapi: The kacapi is a zither-like Sundanese musical instrument played as the main accompanying instrument in the Tembang Sunda or Mamaos Cianjuran, kacapi suling (tembang Sunda without vocal accompaniment) genre (called "kecapi seruling" in Indonesian), pantun stories recitation or an additional instrument in Gamelan Degung performance.

Tonkori: The tonkori (トンコリ ) is a plucked string instrument played by the Ainu people of Hokkaidō, northern Japan and Sakhalin.  It generally has five strings, which are not stopped or fretted but simply played "open".  The instrument is believed to have been developed in Sakhalin.  By the 1970s the instrument was practically extinct, but is experiencing a revival along with the increased interest in Ainu heritage.

Aeolian harp: An Aeolian harp (also wind harp) is a musical instrument that is played by the wind.  Named for Aeolus, the ancient Greek god of the wind, the traditional Aeolian harp is essentially a wooden box including a sounding board, with strings stretched lengthwise across two bridges.  It is often placed in a slightly opened window where the wind can blow across the strings to produce sounds.  The strings can be made of different materials (or thicknesses) and all be tuned to the same pitch, or identical strings can be tuned to different pitches.  Besides being the only strung instrument played solely by the wind, the Aeolian harp is the only stringed instrument that plays solely harmonic frequencies.

Qanun (instrument): The kanun, ganoun or kanoon (Arabic: قانون‎ , "qānūn " ‎ ; Hebrew: קָנוֹן‎ , "qanon"; Persian: ‎ ‎ , "qānūn"; Turkish: "kanun" ; Armenian: քանոն , "k’anon " ; Azerbaijani: "qanun" ; Greek: κανονάκι , "kanonaki " ; Uyghur: قالون ‎, ULY: "qalon" ) is a string instrument played either solo, or more often as part of an ensemble, in much of the Middle East, Maghreb, West Africa, Central Asia, and southeastern regions of Europe.  The name derives from the Arabic word "qanun", meaning "rule, law, norm, principle", which is borrowed from the ancient Greek word and musical instrument (rule), which in Latin was called canon (not to be confused with the European polyphonic musical style and composition technique known by the same name).  Traditional and Classical musics executed on the qanun are based on Maqamat or Makamlar.  As the historical relative of santur from the same geography, qanun is thought to trace its origins back to Assyria, where an ancestral homologue might have been used in Mesopotamian royal courts and religious ceremonies.  The instrument today is a type of large zither with a thin trapezoidal soundboard that is famous for its unique melodramatic sound.

Raghunath Manet: Raghunath Manet is an Indian classical musician and dancer born in the union territory of Puducherry.  He is trained in Bharathanatyam and plays the Veena, a Carnatic instrument.  He has collaborated with French performers such as Antoine Bourseiller, Didier Lockwood and Michel Portal and is a recipient of the Chevalier award.

List of bass guitarists: This is a list of electric bass guitar players that have their own separate article in Wikipedia.  The bass guitar is a stringed instrument played primarily with the fingers (either by plucking, slapping, popping, or tapping) or using a pick.  Since the 1950s, the electric bass guitar has largely replaced the double bass in popular music.  Bass guitarists provide the low-pitched basslines and bass runs in many different styles of music ranging from rock and metal to blues and jazz.  Bassists also use the bass guitar as a soloing instrument in jazz, fusion, Latin, funk, and in some rock styles.  Musicians known mainly as guitarists are listed separately in the list of guitarists.

Bowed dulcimer: The bowed dulcimer is a musical instrument.  Designed in the style of the Appalachian dulcimer (a fretted string instrument of the zither family, typically with three or four strings), it is either a standard instrument played with a violin bow, or a purpose-built dulcimer designed around bow playing.  The purpose-designed instrument is described as resembling a hybrid between a dulcimer and a cello or viola da gamba.

Supporting paragraphs: Raghunath Manet Veena
Answer: Veena