Question: When was the first electric instrument that Kaveh Rastegar plays made?

full_context: Document 1: Jimmy Earl: James Christopher "Jimmy" Earl (born 1957) is an American jazz bass guitarist who is a member of the "Jimmy Kimmel Live!" band.
Document 2: Mandolin: The instrument was primarily used in an ensemble setting well into the 1930s, and although the fad died out at the beginning of the 1930s, the instruments that were developed for the orchestra found a new home in bluegrass. The famous Lloyd Loar Master Model from Gibson (1923) was designed to boost the flagging interest in mandolin ensembles, with little success. However, The "Loar" became the defining instrument of bluegrass music when Bill Monroe purchased F-5 S/N 73987 in a Florida barbershop in 1943 and popularized it as his main instrument.
Document 3: Eberhard Weber: Eberhard Weber (born 22 January 1940 in Stuttgart) is a German double bassist and composer. As a bass player, he is known for his highly distinctive tone and phrasing. Weber's compositions blend chamber jazz, European classical music, minimalism and ambient music, and are regarded as characteristic examples of the ECM Records sound.
Document 4: Reed Ghazala: Qubais Reed Ghazala (born 1953), an American author, photographer, composer, musician and experimental instrument builder, is recognized as the "father of circuit bending," having discovered the technique in 1966, pioneered it, named it, and taught it ever since.
Document 5: Kaveh Rastegar: Kaveh Rastegar (born November 17, 1975) is a Grammy-nominated American bass guitarist and composer. He is a founder of Kneebody and Dakah, and plays with pop and jazz musicians around the world. He has been recognized in the Downbeat Magazine Reader's Poll for electric bass in 2010 and 2011.
Document 6: Ned Steinberger: Ned Steinberger (b. Princeton, New Jersey, 1948) is an American creator of innovative musical instruments. He is most notable for his design of guitars and basses without a traditional headstock, which are called Steinberger instruments. He also has a line of electric basses and string instruments through his company called NS Design and was also the designer of the first ever Spector bass, the NS. In addition, Ned and Emmett Chapman, creator of the Chapman Stick, collaborated on the creation of the NS Stick, a guitar/bass "multi-mode" instrument sold by Stick Enterprises.
Document 7: The Gurdjieff Ensemble: "The Gurdjieff Folk Instruments Ensemble" based in Armenia was founded in 2008, and is led by the Armenian musician, Levon Eskenian. The Ensemble’s awards include the prestigious Dutch Edison Award: Best World Music Album 2012 and Armenian National Music Award: Best Folk Music Album 2011, for their album, “Music of Georges I. Gurdjieff,’’ produced by ECM Records. The ensemble consists of Armenia’s leading practitioners of traditional music performing on Duduk, Blul, Kamancha, Oud, Kanōn, Santur, Tar/Saz, Dap/Daf, Dhol, and Tombak. The repertoire is composed of the “mystic and spiritual teacher,” George I. Gurdjieff's Armenian, Greek, Assyrian, Arabic, Kurdish, Caucasian spiritual and folk music, authentically arranged for Eastern instruments by Eskenian. The repertoire also includes additional Eastern music that exemplifies Gurdjieff’s musical influences during his travels in the East.
Document 8: Bass guitar: In the 1930s, musician and inventor Paul Tutmarc from Seattle, Washington, who was manufacturing lap steel guitars, developed the first electric string bass in its modern form, a fretted instrument designed to be played horizontally. The 1935 sales catalog for Tutmarc's electronic musical instrument company, Audiovox, featured his ``Model 736 Bass Fiddle '', a four - stringed, solid - bodied, fretted electric bass instrument with a 30 ⁄ - inch (775 - millimetre) scale length. The adoption of a guitar's body shape made the instrument easier to hold and transport than any of the existing stringed bass instruments. The addition of frets enabled bassists to play in tune more easily than on fretless acoustic or electric upright basses. Around 100 of these instruments were made during this period.
Document 9: Music Man Bongo: The Bongo is a model of bass guitar manufactured by Music Man, a division of Ernie Ball. It was first introduced at the NAMM Show on March 21, 2003. Ernie Ball president Sterling Ball designed the instrument in conjunction with the Music Man Research and Development department and BMW's Designworks team. It is equipped with an 18-volt 4-band preamp (except on the single-pickup model, which has a 3-band preamp; single-pickup models with piezo bridges have a 4-band preamp) designed by Dudley Gimpel with help from Cliff Hugo and other Music Man artists. It also sports a sleek, carved basswood body with high-gloss polyester finish and a satin-finish painted 34" scale maple neck with rosewood fingerboard (pau ferro on lined or unlined fretless, ebony on both fretted and fretless "stealth" basses) featuring 24 high-profile wide frets and crescent moon-shaped position inlays. These basses are generally known for their dual humbucking pickup configuration, as they are the first twin humbucker-equipped models released by Music Man since the introduction of their Sabre and Cutlass bass guitars in the late 1970s.
Document 10: Stone Raiders: Stone Raiders members are Jean-Paul Bourelly, a Chicago born jazz fusion and blues rock guitarist, Darryl Jones, also a Chicago born jazz and rock bass guitarist who also plays with The Rolling Stones, and Will Calhoun, an American drummer and a member of the group Living Colour.
Document 11: Höfner 500/1: The Höfner 500/1 violin bass (nicknamed the "Beatle bass" or "Cavern bass") is a hollow-bodied bass guitar manufactured by Höfner under several varieties. It was introduced in the mid-1950s and gained celebrity status during the 1960s as one of the primary basses used by Paul McCartney of The Beatles.
Document 12: Grammy Award for Best American Roots Performance: According to NARAS, the new award will encompass all of the subgenres of the American Roots category field, which include Americana, bluegrass, blues, folk and other forms of regional roots music. The category will be open for solo artists, duos, groups and other collaborations and is for singles or tracks only.
Document 13: Greg Reeves: Greg Reeves is an American bass guitarist. He is best known for playing bass on Crosby, Stills, Nash & Young's Déjà Vu (1970).
Document 14: Mandolin: Another family of bowlback mandolins came from Milan and Lombardy. These mandolins are closer to the mandolino or mandore than other modern mandolins. They are shorter and wider than the standard Neapolitan mandolin, with a shallow back. The instruments have 6 strings, 3 wire treble-strings and 3 gut or wire-wrapped-silk bass-strings. The strings ran between the tuning pegs and a bridge that was glued to the soundboard, as a guitar's. The Lombardic mandolins were tuned g b e' a' d" g". A developer of the Milanese stye was Antonio Monzino (Milan) and his family who made them for 6 generations.
Document 15: Solid body: The origins of the solid body electric guitar are confusing. The first commercially available solid body electric Spanish guitar was produced by the Rickenbacker company in 1931. Les Paul, a guitarist, is often erroneously credited with inventing the first solid body, but Fender is often incorrectly credited as the first to commercially market a solid body electric guitar, which itself was based on a design by Merle Travis. Also it is reported that around the same time (1940) a solid body was created by Jamaican musician and inventor, Hedley Jones. In the 1940s, Les Paul created a guitar called the ``Log, ''which came`` from the 4'' by 4 ''solid block of pine which the guitarist had inserted between the sawed halves of the body that he'd just dismembered. He then carefully re-joined the neck to the pine log, using some metal brackets.'' He then put some pickups that he designed on it. He soon went to companies asking if they would buy his guitar. They turned him down. However, after the Fender Telecaster electric guitar became popular, the Gibson company contacted him and had him endorse a model named after him, The Les Paul guitar. It came out in 1952.
ground_truth: the 1930s
sub_queries: Kaveh Rastegar >> instrument Answer: bass guitar
when was the first electric bass guitar made Answer: the 1930s