La Traviata owes its enduring popularity to a superb story of young love and fatal sacrifice, set to music by Italy’s master melodist at the peak of his powers. Interest and poignancy are added by the fact that this is a true story - the baritone ‘heavy’ is Alexander Dumas who wrote The Count of Monte Cristo. But it is the central figure, the heroine Violetta, the archetypal ‘whore with the heart of gold’ who dominates the piece. It is her opera and we love her for it.

Rigoletto is simply wonderful entertainment with superb music. It is also much more - a daring (for its time) attack on aristocratic privilege, a tender love story, and an impassioned appeal on behalf of the disadvantaged, all set to music of such wealth and beauty that, with its sister operas La traviata and Il trovatore, it has defined Italian opera for 150 years. Overcoming initial trouble with the censors, Verdi's Rigoletto was a smash hit at its premiere and has not been out of the repertoire since. It’s not hard to see why.

Monteverdi’s Orfeo, first performed in 1607, generates a special excitement because it is the first unquestioned masterpiece of opera. Notable for its precise orchestration and powerful drama it was a groundbreaking work. It concerns the legend of Orpheus, the demigod whose music had the power to conquer the forces of Hell and to bring his wife back, briefly, to life. The extracts used in this introduction are from Naxos’ full recording; it uses authentic period instruments, which serve to evoke the early Baroque period of the opera’s composition.

Madama Butterfly runs the gamut of operatic emotions. The title heroine has a fragility wonderfully expressed in her entry music, deep sexual instincts as shown in the love duet, and immense tragic stature in her last hours. The fate of Madama Butterfly - married to an American sailor and then abandoned - engages our emotions to a degree equaled by few other opera heroines. The oriental setting and the exquisite orchestral and choral writings are treasured bonuses.

Così Fan Tutte contains some of Mozart’s most sublime music. On one level, the opera is purely a social anecdote about young people falling in and out of love; but Mozart was a supreme sensualist and a great humanist, and invested the tale with all his understanding of humanity and young love. In this title, David Timson refutes the charge that Mozart squandered his genius on a work full of trivial nonsense and proves this "miraculous yet problematic" opera to be a great work of theatre. To listen to this thought-provoking examination of the characters and the music is both thoroughly enriching and great fun.

Fidelio is a work like no other. Beethoven’s only opera is about the joy of married love - by a man who never knew that pleasure. It is about heroism by a man who was often mean and petty in his human relations; it is about freedom by a man who was a prisoner of his own deafness; and ultimately it is about joy by a man who experienced precious little of it.

Ancient Egypt and the war with Ethiopia is the setting for Verdi’s grandest opera. It is the story of the love between Rhadames, the Egyptian general, and Aida, an Ethiopian slave, and the jealousy of Amneris, daughter of the King of Egypt. It was written in 1871 to a commission from the Khedive of Egypt to inaugurate the new opera house in Cairo. Aida generally is considered one of the most spectacular of Verdi’s operas.

The Barber of Seville is Rossini’s most popular opera. Its effervescent overture (written originally for another work!) presents a perfect platform for the amusing plot in which the barber, Figaro, stage-manages a romance between Count Almaviva and Rosina, and puts to flight the old suitor, Dr Bartolo. "Largo al Factotum" is one of the most popular arias in opera - nearly 200 years after its first performance it is still one of the great show-stoppers.

Verdi’s Falstaff repays careful study with real pleasure. It is opera’s happiest irony that the great Italian master should cap a career - distinguished for its blood-and-thunder tragic masterpieces - with the greatest comic opera in the Italian repertory. The genius of Shakespeare is harnessed (in a miracle of compression) by master-librettist Boito to give the 80-year-old Verdi a superb libretto, on which he lavished more wonderful tunes than most composers manage in a lifetime.

Il Trovatore has been ruthlessly parodied. It is a tale of murder and mayhem, burned babies, roasted hags, would-be nuns, strolling minstrels, and bad baritones. And indeed the libretto does call for a willing suspension of disbelief. The reward is in the music, a score as prodigally melodic as only the mature Verdi could write: the "Anvil" chorus, the "Miserere" scene, two great tenor arias, a beautiful baritone aria - a richness without embarrassment.

Don Giovanni has long been regarded as Mozart’s supreme theatrical achievement. The subject seems unpromising - the last day in the life of the notorious womanizer Don Juan - but the skill of the librettist allied to the genius of Mozart at the very peak of his powers has created a work which is not only highly entertaining but reflects an incredible understanding of the human condition.

La Bohème is one of the three operas - the others are Carmen and Aida - believed to be the most popular ever written. In the case of La Bohème the reason is that it virtually defines the term "romantic". The poignant story of Mimì and Rodolfo is told in music of such tender beauty, allied, as always, to Puccini’s intuition of what works in the theatre. The result is an opera that readily appeals to our emotions and senses.

The Magic Flute almost defines a masterpiece, because it can be enjoyed on every level. It is a superb fairy story, complete with dragons, demons, a handsome prince, and a lovely maiden seriously in need of rescue; it is a political satire, social commentary, and psychological drama; it is full of tunes from the playful to the heart-stopping, jolly songs, and deeply spiritual outpourings. It is, in short, "Mozart" - and there is no greater compliment than that.

Die Fledermaus is one of the few operatic works to which the phrase "never a dull moment" can be truthfully applied. From the explosive opening of the famous overture - reminiscent of a volley of champagne corks - through the surging energy of the "Fledermaus Waltz" and the many comic numbers, of which the accelerando trio is the finest, up to such huge concerted numbers as the "Duidu" finale to Act II, this is an operetta which almost incarnates nostalgia. Thomson Smillie and David Timson infuse their exploration of Die Fledermaus with as much life as the operetta itself.

Tristan und Isolde centres around two lovers who dream of romantic love and yearn for oblivion. No composer had written such a work before. Turning his back on traditional tonality, Wagner changed the course of Western music with Tristan und Isolde. But there’s also fact behind the fiction: while he wrote his opera Wagner was in love with another’s man’s wife, Mathilde Wesendonk. So Tristan and Isolde are also Richard and Mathilde.