Question: Essential Montreux is a box-set by a singer known for being a guitar virtuoso in what two genres?
Context: The David Grisman Quintet is a self-styled alternative bluegrass/acoustic jazz band founded by David Grisman in 1975 in San Francisco, California, USA.  Inspired by such diverse genres as Bill Monroe's bluegrass legacy and Django Reinhard's 1930s swing, the Quintet created an entirely new style of acoustic music, and has inspired countless other musicians to take similarly eclectic approaches to their music.  Since its formation, the Quintet's members have included guitar virtuoso Tony Rice and multiinstrumentalists Mark O'Connor, Mike Marshall, Darol Anger and Jon Sholle.  The Quintet has performed and recorded with special guests such as violin great Stephane Grapelli, and remains active.  The National Public Radio program "Car Talk" uses the band's instrumental "Dawggy Mountain Breakdown" as its theme music. Ivan Eugen Padovec (17 July 1800 – 4 November 1873), commonly known as Johann (Ivan) Padowetz (see the signature on the photo), born in the baroque town of Varaždin in Croatia (known for its festivals of baroque music), was a guitar virtuoso, who gave concerts in Zagreb, Vienna, Prague, Budapest, Hamburg, London, etc.  He constructed a ten-string guitar.  Also, his "Theoretisch-praktische Guitarrschule" was published by Werner & Comp.  in Vienna around 1844. La Barranca has been a successful ongoing outfit for over a decade.  Based in Mexico City, they are led by guitarist and songwriter José Manuel Aguilera, who previously and concurrently worked with Sangre Azteka, Jaguares, Cecilia Toussaint, Steven Brown/Nine Rain (Tuxedomoon), and more.  He has an unusually economical style of playing that concentrates on great rhythms, superb tone, and very melodic solos.  After the original lineup—Aguilera, Federico Fong (bass), Alfonso Andre (drums), all of whom were guest members of Jaguares with former Caifanes frontman Saúl Hernández—went its separate ways, a second version of the band included Santa Sabina guitar virtuoso Alex Otaola and the extremely flexible rhythm section of brothers Jose María ("Chema") and Alonso Arreola.  The band's sound effortlessly moves from flat out rock to fusion-ish jamming and passes through a kind of Mexican folk influence along the way.  Aguilera is a good singer with a talent for finding simple melodies amidst rather complex songs.  On "El Fluir" the band decided to record live and to cut back on the keyboard and programmed additions to their music.  Surprisingly, the result was not an over-the-top jamfest but rather a very tightly arranged set of songs that hinted at the overwhelming power they could possess in concert.  The two guitar interplay between Aguilera and Otaola was highly impressive as they explored all forms of playing together and against one another (with Otaola pulling all sorts of radical sounds out of his guitar).  "El Fluir" was their first US release since "Tempestad" in 1998.  This edition was further sweetened by the inclusion of a previously unreleased bonus track and a video for the first single "Pare de Sufrir." Yosi Piamenta (November 29, 1951 – August 23, 2015) was an Orthodox Jewish singer-songwriter and guitarist, known for introducing the electric guitar to Jewish music.  Piamenta played rock and roll tunes, often infused with heavy rock licks and extended guitar solos – all while dressed in Orthodox Jewish religious clothing and singing Biblical Hebrew lyrics.  Piamenta was widely acknowledged by rock critics as a guitar virtuoso. Victor Ivanovich Zinchuk (Russian: Виктор Иванович Зинчук ; born April 8, 1958, Moscow) is a Russian guitar virtuoso, composer, arranger, Honored Artist of Russia.  Golden Guitar Russia.  Victor Zinchuk plays on stage as guitar virtuoso from 1987. Charlemagne: The Omens of Death is the fourth and final album by actor and heavy metal singer Christopher Lee.  It was released on 27 May 2013.  It is a sequel to his album "" (2010).  The music was arranged by Judas Priest's Richie Faulkner, and features prominent Guatemalan guitar virtuoso and World Guitar Idol Champion Hedras Ramos on guitar, as well as his father, Hedras Ramos Sr, on bass. Essential Montreux is a special edition, five CD box-set, by Northern Irish, blues rock guitarist and singer, Gary Moore.  The box-set features five out of the six performances Gary Moore made at the Montreux Jazz Festival.  His live performances at Montreux that feature in this box-set are Live at Montreux 1990, 1995, 1997, 1999 and 2001. Blues Saraceno (born October 17, 1971) is an American rock guitarist, composer and music producer, currently residing in Los Angeles, California.  He was discovered by "Guitar for the Practicing Musician" magazine at the age of 16, which assisted him in releasing instrumental recordings on an independent basis.  Saraceno's high profile as a gifted guitar virtuoso and musician opened the doors to an early career as a first-call guitar sideman and session musician.  Saraceno is most often recognized from his time playing with Jack Bruce and Ginger Baker (Cream) as well as his brief tenure with the Hard rock band Poison.  Saraceno's early success in the music industry would eventually blossom into a career in producing and composing for television and film. Robert William Gary Moore (4 April 1952 – 6 February 2011) was a Northern Irish musician, most widely recognised as a singer, songwriter, and virtuoso rock and blues guitarist. Francesco Corbetta (ca. 16151681, in French also Francisque Corbette) was an Italian guitar virtuoso, teacher and composer.  He spent his early career in Italy.  He seems to have worked as a teacher in Bologna where the guitarist and composer Giovanni Battista Granata was one of his pupils.  He was then attached to the Court of Carlo II, Duke of Mantua in various capacities.  He was however frequently granted leave of absence and travelled abroad to Spain probably between 1644-1647 where he amazed the Court in Madrid with his virtuosity; to Germany where he was in the employ of the dukes of Hanover and the Spanish Netherlands, dedicating his fourth book, "Varii scherzi di sonate" to the governor, the Archduke Leopold Wilhelm.  According to his obituary the Duke of Mantua recommended him to Louis XIV; although some source claim that he taught Louis the guitar this is unlikely as the post is known to have been held by Bernard Jourdan de La Salle from 1650 when Louis was 12 years of age until 1695.  Although Corbetta may have visited Paris earlier he probably did not settle there before 1654.  In 1656 he took part in the ballet "La galanterie du temps" by Jean-Baptiste Lully.  He came to the attention of the English King Charles II in exile and at the Restoration accompanied him to London.  During the last 20 years of his life he divided his time between London and Paris.  He is regarded as one of the greatest virtuosos of the Baroque guitar.
Answer: rock and blues