Painted during his first trip to Paris in 1900, Picasso’s Le Moulin de la Galette is an outsider’s view of an exotic and intimidating new world. Men and women are seen as if through some strange distorting lens, their blurred, mask-like faces indistinct but for red-slit mouths and coal-black eyes. We seem to be in the room with them, and yet we are isolated. Even a woman looking out from the edge of the canvas gazes straight past us: if not invisible, we are certainly inconsequential.

"We're off to Glyndebourne, to see a ra-ther bor-ing op-ra by Rosseeeni," quoth songwriting wags Kit and the Widow. So here it was at the Sussex house after a 34-year absence, the most famous of all his operas which includes the overture’s oboe tune to which those words were set, and it wasn't possible that The Barber of Seville, pure champagne, could ever be boring. Or was it? Never underestimate the power of vaguely-conceived direction to rob musical wit and precision of their proper glory.

Tucked away in a warren of residential streets in the older part of Guildford, The Old Glassworks looks like a lock-up garage, and seems to have been designed to repel unwanted attention with a private force-field of anonymity. Once you've been welcomed inside, however, you find yourself in an improbable wonderland of mysterious musical instruments, from lutes and rare 17th century guitars to members of the violin family in various states of deconstruction.

Claims to embody the spirit of flamenco, or to be born with flamenco in one's blood, abound in the programme of the annual Sadler's Wells flamenco festival. Sara Baras, whose show Voces opened the two week festival on Tuesday, doesn't make such a claim in writing: she doesn't need to. Her every move on stage radiates the self-possession of a flamenco aristocrat, a confidence so vital it simply bulldozes proscenium and fourth wall to set up a visceral – and vocal – relationship between audience and performer.

The career of the Gran Canaria-born musician Pablo Díaz-Reixa seems to work in an accelerated time-frame, speeding through decades and eras as he develops his sound. Though he has always worked with digital technology, his early work sounded archaic, its massed carnival percussion and traditional melodies roaming around the Afro-Latin diaspora.

The latest themed season from WNO, to add to their fallen women, Donizetti queens and what not, goes by the slightly worrying title (for anyone with a short attention span) of “Figaro Forever”, and consists of an operatic sequence derived from Beaumarchais’ three Figaro plays and ending with a new opera by Elena Langer partly based on the last of them, La mère coupable.

Guadalupe Plata are a Spanish three-piece whose tunes will be a sonic treat for those who like their blues raw but with an extra dash of flavour. On their self-titled second album, spikey blues, bebop and rockabilly sounds rub up against the Moorish and Romany roots of Andalusian traditional music to produce a very special gumbo that will appeal to lovers of RL Burnside, Tav Falco, Link Wray and gutsy Latino bands like The Plugz and Tito and Tarantula.

"I fell in love with the psychology of Goya and his palette,” wrote brilliant composer-pianist Enrique Granados at the beginning of an evocative paean prefacing his six original Goyescas of 1909-11, finely-wrought gems of the piano repertoire. In love, too, are most of us who have gaped with awe at the astonishing range and careful selection of portraits in the current National Gallery exhibition - one of its best ever, equal in revelation to the recent Rembrandt spectacular.

L'Arpeggiata seem to revel in being L'Anachronista. The baroque-jazz group led by the Graz-born theorbo player Christina Pluhar has been proudly and brazenly flouting the dictates of those who set the rules of Historically Informed Performance (HIP) for all 15 years of their existence.

The second instalment of this three-part series on the history of Spain (from the BBC in collaboration with the Open University) told a tale that is probably still relatively unfamiliar in the Anglophone world. That’s despite the fact that one of its star turns was the financing by that fervently religious 15th century Iberian power couple, Ferdinand of Aragon and Isabella of Castile, of the legendary voyage of Christopher Columbus.