This double-disc album is an illuminating 21/2-hour musical tour of Vienna, from the classical era of Mozart to the 20th-century iconoclasm of Arnold Schoenberg, seen through the lenses of woodwinds, piano and strings.

Clarinettist Maximiliano Martin and pianist Julian Milford are ever-present in all the seven works performed.

The first disc opens with Mozart's Kegelstatt Clarinet Trio K. 498, delightfully scored for clarinet, viola and piano.

Its congeniality and warmth continue into the famous pair of Piano Quintets (piano with winds, namely clarinet, oboe, bassoon and French horn) by Mozart and Beethoven, perfect partners heard alongside each other.

The Second Viennese School occupies the second disc.

But first listen to the Trio In D Minor for clarinet, cello and piano by Alexander Zemlinsky, better known as a teacher and Schoenberg's brother-in-law.

Its late Romantic and Brahmsinfluenced idiom is a shock to the system when followed by Schoenberg's compact Chamber Symphony No. 1 (transcribed by his student Anton Webern), which openly flirts with atonalism.

The ground-breaking 12-tone idiom becomes established with the Adagio from Alban Berg's Chamber Symphony, but the music has vestiges of lushness and sentimentality.

To close, Johann Strauss the Younger's Emperor Waltz, arranged for septet by Schoenberg, makes for a particularly delicious encore.

Chang Tou Liang