Pianist and composer Kate Whitley performed Stravinsky’s The Rite Of Spring in a disused multi-storey car park in Peckham and tempted an audience of more than 1,500 to come to listen.

Now the Cambridge graduate, who began playing the piano aged four and composing aged 13, brings her contemporary approach to Lewes Chamber Music Festival.

Throughout June, Multi-Story, the innovative music education project Whitley runs with Chris Stark, has been running intimate musical workshops at primary schools in Lewes.

And tomorrow, Whitley will unveil a world premiere of her new work, Piece for Piano, Clarinet and String Trio.

The award-winning 24-year-old composer’s creation will be performed by Tom Poster, Matt Hunt, Beatrice Philips, Tom Hankey and Hannah Sloane at the Festival Extravaganza show, in St John Sub Castro Church, Lewes, at 7pm. Whitley and her attempt to take classical music out of the concert hall has been called “the most exciting development in classical music for decades, if not centuries”.

It fits with the aims of Lewes Chamber Music Festival artistic director and violinist Beatrice Philips, a chamber musician, soloist, orchestral player and teacher who plays with the London Chamber Orchestra, the London Contemporary Orchestra and the John Wilson Orchestra.

“The festival is about bringing an abundance of extraordinary music performed by a collection of today's finest chamber musicians to intimate settings in and around Lewes, and sharing it with as many people as possible”.

Tom Poster will join fellow pianist Alasdair Beatson to perform Mozart’s Sonata for four hands in D major K381 in the Festival Extravaganza show. This will be followed by Beethoven and Taneyev performed by the Barbican Piano Trio, with James Boyd and director Philips.

More than 20 artists will perform in the festival, with concerts at the Westgate Chapel, High Street, Lewes, and St Peter's Church in nearby Firle as well as the festival hub, St John Sub Castro Church.

To launch the 2014 edition of Lewes Chamber Music festival, pianist Tom Poster joins violinist Hélène Maréchaux and cellist Hannah Sloane for a performance of Haydn’s Piano Trio in C major.

The show also includes Taneyev’s Sixth String Quartet, played by violinists Catherine Manson and Tom Hankey, as well Beethoven’s “Archduke” Piano Trio Op. 97, played by pianist Alasdair Beatson, violinist Beatrice Philips and cellist Robin Michael (Friday, June 27, St Johns Sub Castro, 6:30pm).

For Late Night Brahms, the Westgate Chapel’s Hibbert Room will be transformed into a pop-up restaurant.

Local Sauce chef Sheba Anvari will serve up a two-course meal before a performance of Brahms’ Clarinet Quintet, with clarinettist Matt Hunt, violinists Katharine Gowers and Tom Hankey, violist Timothy Ridout and cellist Hannah Sloane (Friday, June 27, 10pm, supper from 8:45pm).

Celan Quartet, the young London-based string quartet formed in 2011, join clarinettist Matt Hunt to tackle Mozart’s own arrangement of his B flat Violin Sonata K317. A romantic Russian masterpiece by Arensky will follow Mozart’s music at Saturday’s Lunchtime Concert in St Peter’s Church, Firle, at 1pm.

Another highlight is Afternoon Stories, with the wartime stories told by Ravel and Stravinsky – Soldier’s Tale – and a performance of Janácek’s dark and troubled Sonata for Piano, written in response to the cruel death of a labourer in 1905 at a demonstration outside a Czech university. And award-winning baritone Jonathan McGovern will perform a set of songs written by Ravel, based on the story of Cervantes’ hero Don Quixote, at the Afternoon Stories event on Sunday, June 29, at St John Sub Castro, from 2.30pm.

Dominic Smith