Spiritwalking is a work for String Quartet by Philip Glass commissioned by Nederlands Dans Theater and the Norwegian National Opera and Ballet for the world premiere of the ballet 'Spiritwalking'by Lightfoot León on 7th June 2014 at Market Hall in Amsterdam. This is the Score and Parts.

Holmboe's last quartet work which is unoffi­cially also String Quartet No. 21 was the last work he ever composed and was unfinished on his death in 1996. His pupil Per Nørgård has finished the quartet and himself characterizes his contribution by saying that the score existed “in an only partly completed form which could however be written out with only a few cases of doubt”. With only two movements and a play­ing time of about nine minutes it is at its exist­ing length the shortest of Holmboe's string quar­tets. The first movement takes the form of one long arch in a rocking triple time which constantly shiftsamong different tempo and pulse sensations. At the same time the rhythmic en­ergy increases until the movement in a faster Con moto tempo accelerates to a more flowing 12/8 time coloured both rhythmically by cross-­rhythms in duple time and timbrally by harmon­ics in the viola. In its middle section Con fuoco the movement culminates in both tempo and expression until it falls calm in brief recapitula­tions in reverse order of the first two sections. The rocking feeling continues in the second movement but now at a more extroverted level from the outset Allegro and pizzicato. The en­ergy builds up further as the mood intensifies to Con fuoco while all instruments go over to bowed playing but like the first movement this movement ends Adagio here however not as a gradual attenuation but through a sudden shift in tempo to a calm imitative passage before the movement slowly thins out to the almost inaudible through a last dense open sounding chord with a brief violin solo above it. The quartet is dedicated to Holmboe's wife MeLa May Holmboe and was given its first performance by the Kontra Quartet on 22nd March 1997 at the Carl Nielsen Academy of Music in Odense Denmark.

Hoffmeister Quartet and Prussian Quartets-Over the next few years all 26 of Wolfgang Amadeus Mozart?s String Quartets will be published by Henle in an Urtext Edition of both score and parts. All previous editions have left much to be desired for example asconcerns the correct placement of dynamic markings.Henle?s edition made with the artistic collaboration of the Armida Quartet draws upon the large body of modern knowledge concerning Mozart philology andperformance practice. We begin with what are chronologically speaking the final four quartets: the so-called ?Hoffmeister? Quartet K. 499 and the three ?Prussian? Quartets K. 575 589 and 590.It is possible that the impulse behind the composition of these last three works was the Prussian King Friedrich Wilhelm II who was an excellent cellist. Modern cellists will find many beautiful melodies to enjoy in thesequartets.