Acoustic electric Guitars: this is a term used to describe acoustic guitars that have pickups installed in them so they can be plugged into amplifiers or PA systems. The majority of acoustic guitars you see on stage are acoustic electric guitars. Structurally, they are identical to traditional acoustic guitars.

Electric Guitars: these types of guitars made out of a solid piece of wood and rely exclusively on their electronic pickup systems and amplifiers for their volume. Their unique sound lends itself best to rock and roll, but they have also substantially shaped the sound of country music in the last 50 years. (Think "twang")

Classical Guitars: also called "nylon-string", classical guitars are used almost exclusively in the classical and folk idioms, but can also be found on more popular recordings. Carlos Santana makes a lot of use of the classical guitar in his recordings. Slightly smaller than a traditional acoustic, they feature slightly wider necks and strings that are made of nylon rather than steel, to give them a very gentle, warm sound. The best Classical guitars are usually from Spain.

Hollow-body Guitars: These are simply traditional electric guitars that have chambers cut in the body to allow for more sonic resonance. They come in many different sizes and are favored primarily by players of blues and jazz music.

Steel Guitars: These are the farthest breed apart from traditional guitars so far. While any guitarist can pick up any guitar

from the above list and play, a steel guitar requires special training to play. The guitar is played flat on its back, and the strings are elevated approximately half an inch above the fretboard. This allows the strings to be played using a "tone bar" that takes the place of the fingers on a fretboard and gives the steel guitar its classic "crying sound". This is the archetypal guitar sound.

Frans Winther .

Le violoncelliste suédois Frans Helmerson a commencé sa formation musicale avec Guido Vecchi à Göteborg avant de passer à étudier avec Giuseppe Selmi à Rome et William Pleeth à Londres. Sergiu Celibidache et Mstislav Rostropovich a également joué un rôle très influent dans son développement artistique. En 1971, il a remporté l'un des prix de musique les plus célèbres pour les violoncellistes, le concours Cassado à Florence - la première de nombreuses autres distinctions. Tours lui ont pris à d'autres pays en Europe ainsi qu'au Japon, la Russie, l'Amérique du Sud, l'Australie, la Nouvelle-Zélande et les États-Unis. 

Frans Helmerson joue avec de nombreux orchestres de renom et reçoit des critiques élogieuses exceptionnelle pour ses concerts et enregistrements. 

Son amour de la musique de chambre est une autre force motrice importante dans ses projets musicaux. Il est régulièrement invité dans les grands festivals européens tels que Verbier, Pablo Casals-Festival ou le Festival de Ravinia, et a passé de nombreuses années en tant que directeur artistique de la Umea-Korsholm international Chamber Music Festival. En 2002, il fonde le Quatuor à cordes de Michel-Ange avec Mihaela Martin, Stephan Picard et Nobuko Imai. En plus de sa carrière de soliste, chambriste et chef d'orchestre, Frans Helmerson enseigné de nombreuses années en tant que professeur aux Conservatoires de Cologne et à Madrid. Depuis 2011/12, il a enseigné en tant que professeur invité à l'Académie de musique Hanns Eisler de Berlin. Frans Helmerson joue un violoncelle de Domenico Montagna (1690-1750).