account
basket
Challenge Records Int. logo
Viennese Lute Concertos
Wenzel Ludwig Edler von Radolt

Ars Antiqua Austria / Gunar Letzbor

Viennese Lute Concertos

Price: € 12.95
Format: CD
Label: Challenge Classics
UPC: 0608917229127
Catnr: CC 72291
Release date: 01 April 2008
Buy
1 CD
✓ in stock
€ 12.95
Buy
 
Label
Challenge Classics
UPC
0608917229127
Catalogue number
CC 72291
Release date
01 April 2008
Album
Artist(s)
Composer(s)
EN
NL
DE

About the album

Wenzel Ludwig Edler von Radolt’s collection of lute music entitled ”To my most true and confiding friend”, inclined both to the merry and to the sad humours, herewith in the company of other faithful vassals of our innermost sensibility’ was printed in 1701 in Vienna by J(oh)ann Michael Nestler and bears a dedication to the then‚ Roman King’ Josef I.

Radolt was of Austro-Italian aristocratic descent. He was born and died in Vienna. According to his own account, he spent his life ”so allured by the beguiling countenance of most pleasurable music, as to dedicate the course of my life to her“. The ‘Most true and confiding friend’ is the only work of Radolt that survives today. Unusual in the part books are Radolt’s meticulous fingerings for the right hand (!) that give us a precise insight into the style of lute playing current in the imperial city of the period.

This extensive collection of 12 so-called ‘Concerti’ contains much that is remarkable about the Viennese Lute Concerto – a popular genre of the day comprising violins, lute and bass. The variety of scoring is striking: from four-part string writing with three obligato lutes of various sizes, to the relatively intimate combination of single violin, obligato viola da gamba (viol), lute and bass. In another concerto the composer suggests the addition of a wind instrument.
The codex represents the most extensive source of a neglected genre, that once enjoyed great popularity in the German speaking countries – including composers such as Esajas Reussner.

Niet eerder opgenomen Weense luitmuziek door het ensemble Ars Antiqua Austria
Een wel heel bijzondere opname van een verzameling Weense luitconcerten uit 1701, met de titel Die Aller Treüeste Freindin. De vrolijke, maar tegelijkertijd ook droevige muziek is gecomponeerd door de begenadigd amateur luitist Wenzel Ludwig Edler von Radolt. Ars Antiqua Austria onder leiding van Gunar Letzbor en met Hubert Hoffmann op de luit zorgen voor een prachtige balans tussen de instrumenten. Het is muziek die betovert en vrolijk stemt.

Gunar Letzbor, altijd op zoek naar nieuwe Oude Muziek (Oude Muziek of Musica Antiqua, is de verzamelnaam voor muziek uit de middeleeuwen, de renaissance en de barok) werd door Hubert Hoffmann op het bestaan van de enig overgebleven luitconcerten van de Oostenrijkse-Italiaanse edelman Von Radolt gewezen. De orkestpartijen waren her en der verspreid en de 1e vioolpartij was zoek. Gelukkig werd deze na lang zoeken teruggevonden en kon een selectie uit de overgebleven muziekverzameling van Von Radolt voor opname geschikt gemaakt worden.

De Oostenrijkse violist Letzbor richtte in 1989 Ars Antiqua Austria op, met als doel het publiek te laten kennismaken met de Oostenrijkse barokmuziek.

"Ars Antiqua Austria doet zijn reputatie als pleitbezorger van onbekende Oostenrijkse muziek alle eer aan", Klassieke Zaken magazine.

Ars Antiqua Austria' unter Gunar Letzbor widmet sich auf der ersten CD bei CHALLENGE CLASSICS einer ganz besonderen Musikgattung: dem sog. Wiener Lautenkonzert. Diese Auswahl aus Radolts Sammlung 'Der Aller Treuesten Freindin' besticht durch vielfältige Formen und Stile und erzeugt eine ganz eigene, aristokratische Klangwelt, die verzaubert und beglückt. Hubert Hofmann, der die Lautensoli übernimmt, hat diese Kleinode in Archiven entdeckt. Im ausführlichen Booklet erfahren Sie mehr über die spannende Geschichte dieser Wiederbelebung.

Artist(s)

Ars Antiqua Austria

Austrian Baroque music takes centre stage in the repertoire of this unusual Baroque ensemble. The music performed at the imperial court in Vienna at this time was initially heavily influenced by the music of Italy, later by that of France; Spanish court ceremonial also had important artistic effects in Vienna. The typical Austrian sound of this era was characterised by the impact of its many royal domains. The political and societal boundaries of Baroque Austria stretched much further than nowadays. Elements of Slavic, Hungarian and Alpine folk music styles had lasting effects on art music, making up its specific sound. But the Austrian sound also reflects the temperament and the character of the people of the time: placed within the...
more
Austrian Baroque music takes centre stage in the repertoire of this unusual Baroque ensemble. The music performed at the imperial court in Vienna at this time was initially heavily influenced by the music of Italy, later by that of France; Spanish court ceremonial also had important artistic effects in Vienna. The typical Austrian sound of this era was characterised by the impact of its many royal domains. The political and societal boundaries of Baroque Austria stretched much further than nowadays. Elements of Slavic, Hungarian and Alpine folk music styles had lasting effects on art music, making up its specific sound. But the Austrian sound also reflects the temperament and the character of the people of the time: placed within the melting pot of many diverse cultures, amalgamating Mediterranean zest for life, Slavic melancholy, French formalism, Spanish royal ceremony and the original Alpine elements of the German-speaking region. This mixture of court music and folk music with a dance-like character outlines the typically Austrian sound.
Alongside many concert performances, the early years of the ensemble Ars Antiqua Austria were dedicated to musicological research of Austrian Baroque composers. The abundance of rediscovered works led to several successful premiere recordings: albums featuring the works of R. Weichlein, H.I.F. Biber, F. Conti, G.B. Viviani, G.A.P. Mealli, G. Arnold, A. Caldara, B.A. Aufschnaiter, J.J. Vilsmayr, J.P. Vejvanovsky, J. Schmelzer, G. Muffat, W.L. Radolt, C. Mouthon, J.B. Hochreither, F.J. Aumann and J.S. Bach were met with enthusiastic approbation from the international music press.
Ars Antiqua Austria have been designing their own concert series at the Vienna Konzerthaus since 2002, and at the Brucknerhaus Linz since 2008. The ensemble is leading a cycle of performances arranged over several years entitled “Klang der Kulturen – Kultur des Klanges” (“Sound of the Cultures – Culture of Sound”), consisting of ninety concerts set to be performed in Vienna, Prague, Budapest, Bratislava, Krakow, Venice, Ljubljana, Mechelen and Lübeck.
Recent performances include concerts at the Festival de Musique Ancienne de Ribeauvillé, Berliner Tage für Alte Musik, Festival Printemps des Arts de Nantes, Mozartfest Würzburg (an opera production), Tage Alter Musik Herne, Festival de Musique de Clisson et de Loire Atlantique, Folles Journées de Nantes and Tokyo, Musée d’Unterlinden Colmar, Printemps Baroque du Sablon, Festival van Vlaanderen, Festival Bach de Lausanne, MAfestival Brugge, Bologna Festival, Vendsyssel Festival, Concerti della Normale di Pisa, Resonanzen Wien, Klangbogen Wien, Monteverdi Festival Cremona, Bayerische Staatsoper and the Salzburger Festspiele. The ensemble has also been welcomed in the USA and in Japan.
The CD recording with mezzo-soprano Bernarda Fink (four cantatas by Francesco Conti) was awarded a Diapason d’or only one week after being issued. Gunar Letzbor and his ensemble Ars Antiqua Austria were presented with the Cannes Classical Award 2002 for their recording of the Capricci Armonici by G.B. Viviani.

less

Jan Krigovsky

Jan Krigovsky is a double-bass player, multi-instrumentalist, musical events organiser, promoter, art director, manager, producer, publisher, dramaturge and poet. He is well known and sought after interpreter of various musical styles. As a soloist Krigovsky expresses himself with noble, temperamental and technically perfect performance. As a soloist and chamber double bass, G-violone and Vienner Violine player Krigovsky collaborates with numerous ensembles specialising in historically – developed/learned interpretation of old music. He also performs in the ensembles for contemporary music like Catalá Ensamble Trio, Alea and Collegium Wartberg. As a concert master of double bass group he performed with several orchestras such as the London Symphony Orchestra, Moderntimes 1800 and Wiener Akademie. As a soloist, he also worked with orchestras under...
more
Jan Krigovsky is a double-bass player, multi-instrumentalist, musical events organiser, promoter, art director, manager, producer, publisher, dramaturge and poet. He is well known and sought after interpreter of various musical styles. As a soloist Krigovsky expresses himself with noble, temperamental and technically perfect performance. As a soloist and chamber double bass, G-violone and Vienner Violine player Krigovsky collaborates with numerous ensembles specialising in historically – developed/learned interpretation of old music. He also performs in the ensembles for contemporary music like Catalá Ensamble Trio, Alea and Collegium Wartberg. As a concert master of double bass group he performed with several orchestras such as the London Symphony Orchestra, Moderntimes 1800 and Wiener Akademie. As a soloist, he also worked with orchestras under the baton of Yuri Bashmeta, Leoš Svárovský, Martin Haselbock, Jordi Savallla and Ewald Danel.
Jan presented/introduced himself as a soloist, but also as a member of chamber ensembles performing at some of the leading festivals like Bratislava Music Festival, Melos-Étos, Prague Spring International Music Festival, Wiener Fetspiele, Salzburger Festspiele, Festspielwochen Munchen, Dresdener gen Festspiele, Jehudi Menuhin Festival Gstaad, Boston Early Music Festival, Schleswig-Holstein Musik Festival and others.
He has recorded over 150 CD_DVD titles for companies such as Decca, SDBS production, Supraphon, CPO, WDR, NDR, ZDF, Winter&Winter, ORF, Challenge records, Institut fur Tyroler, Musikforschung Innsbruck, Pan Classics, Arcana Records, Symfonia as well as for radio and television. Among his artistic partners were for example Cecilia Bartoli, Sol Gabetta, Riccardo Minasi, Steven Isserlis, Maurice Steger, Nuria Rial, Avi Avital, Gunar Letzbor, Elizabeth Wallfisch, Jürger Essl, Helene Schmidt, Dalibor Karvay, Stano Palúch, Daniel Buranovský, Martin Babjak.
Jan worked as a teacher at the Conservatory in Žilina, the Conservatory of Dezidor Kardos in Topoľčany, the Church Conservatory in Bratislava, the Masaryk University in Brno and the Janacek Academy in Brno. Since 2002 he has been working at the Academy of Arts in Banská Bystrica. He has built wide base/foundation of amazing/outstanding double bass players in Slovakia, including Roman Patkoló, Vlado Žatko, Ján Prievozník, Filip Jaro, Romana Uhlíková and others. Krigovsky regularly teaches master classes in Russia, Poland, the Czech Republic, Slovakia, Austria, Switzerland, Brazil, Argentina, USA, Canada and Mexico.
In 2010, he founded together with his students the Slovak Double Bass Club within which were organised master courses called BassFest Banská Bystrica, International Double Bass Competition of Carl Ditters Von Dittersdorf and hundreds of concerts. In 2013, on his initiative, the double bass quartet named Bass Band was created. In 2012 he founded Musica Perennis Iuventutis, music festival held in Senec and Musica Perennis Sancti Benedecti in Hronský Beňadik. Festivals are dedicated to helping and supporting children in material need and children with disabilities in Slovakia and abroad. At his instigation, dozens of musical works were created for solo double bass and chamber ensembles. In 2012 he established his own ensemble known as Collegium Wartberg.

less

Hubert Hoffmann

Like most musicians of his generation, Hubert Hoffmann, a member of Austria's leading early music ensemble Ars Antiqua Austria, pursues a wide-ranging career as a continuo player with numerous ensembles performing on period instruments all over the world. His fascination for the unique blend of lute music for the Habsburg Courts is reflected in his solo projects, in which he aims to shed light upon this undeservedly neglected niche in baroque lute music repertoire. His first solo CD of works by the Bohemian Count Johann Antonin Losy was received to wide critical acclaim. The second recording of music from the lute manuscript Ms.1255 in the monastery library at Klosterneuburg for the ORF Edition of Classical Music, the first ever recording...
more
Like most musicians of his generation, Hubert Hoffmann, a member of Austria's leading early music ensemble Ars Antiqua Austria, pursues a wide-ranging career as a continuo player with numerous ensembles performing on period instruments all over the world. His fascination for the unique blend of lute music for the Habsburg Courts is reflected in his solo projects, in which he aims to shed light upon this undeservedly neglected niche in baroque lute music repertoire. His first solo CD of works by the Bohemian Count Johann Antonin Losy was received to wide critical acclaim. The second recording of music from the lute manuscript Ms.1255 in the monastery library at Klosterneuburg for the ORF Edition of Classical Music, the first ever recording of Wenzel Ludwig Radolt's important 1701 collection of lute concertos Die allertreueste Freindin for Challenge Classics, and the music of the Vienna lutenist Karl Kohaut, also for Challenge Classics, have now been issued.
In 2012, he was appointed curator of a long-term research project in the fields of lute music, lute playing and lute restoration at Kremsmünster Abbey in Upper Austria, producing an edition of the tablatures for lute and mandora, stored in the music library there. As a part of this work he has recently recorded music of Father Ferdinand Fisher, a lute playing member of this Benedictine Monastery, also for Challenge Classic.
From 2013 to 2015 he was active as chairman of the Austrian Lute Society "ÖLG". As artistic consultant, he is also engaged in establishing a new concert series with music from the Goess Manuscripts in the historic Fronmiller Hall at Ebenthal Castle in Carinthia.
less

Piroska Batori

Piroska Batori was born in Szeged/Hungary. She received her first violin lessons at the age of eight and only one year later was accepted into the class for outstanding students at the Ferenc Liszt Academy of Music in Budapest. She studied in Vienna and at the Guildhall School of Music & Drama London and completed “with distinction” the University of Music and Performing Arts in Vienna in 2004. She is section leader in the moderntimes_1800 chamber orchestra and the Bach Consort Vienna, and is also a member of the Vienna Academy and the Wiener Kammersolisten.
more
Piroska Batori was born in Szeged/Hungary. She received her first violin lessons at the age of eight and only one year later was accepted into the class for outstanding students at the Ferenc Liszt Academy of Music in Budapest. She studied in Vienna and at the Guildhall School of Music & Drama London and completed “with distinction” the University of Music and Performing Arts in Vienna in 2004. She is section leader in the moderntimes_1800 chamber orchestra and the Bach Consort Vienna, and is also a member of the Vienna Academy and the Wiener Kammersolisten.

less

Gunar Letzbor (conductor)

Gunar Letzbor studied composition, conducting and violin at Linz, Salzburg and Cologne. His encounters with Nikolaus Harnoncourt and Reinhard Goebel ignited a deep passion for period instruments and performance practice, leading him to perform extensively with Musica Antiqua Köln, the Clemencic Consort, La Folia Salzburg, Armonico Tributo Basel and the Wiener Akademie.  Gunar Letzbor founded his own ensemble, Ars Antiqua Austria, an instrumental ensemble of varying size dedicated in particular to the exploration of the rich, but neglected, baroque repertoire of his native country and its neighbours. Corollaries of this voyage of re-discovery have been not only the unexpected finds of musical masterpieces otherwise destined to languish in obscurity, but also the articulation of a uniquely central-European instrumental sound and its...
more
Gunar Letzbor studied composition, conducting and violin at Linz, Salzburg and Cologne. His encounters with Nikolaus Harnoncourt and Reinhard Goebel ignited a deep passion for period instruments and performance practice, leading him to perform extensively with Musica Antiqua Köln, the Clemencic Consort, La Folia Salzburg, Armonico Tributo Basel and the Wiener Akademie. Gunar Letzbor founded his own ensemble, Ars Antiqua Austria, an instrumental ensemble of varying size dedicated in particular to the exploration of the rich, but neglected, baroque repertoire of his native country and its neighbours. Corollaries of this voyage of re-discovery have been not only the unexpected finds of musical masterpieces otherwise destined to languish in obscurity, but also the articulation of a uniquely central-European instrumental sound and its often deeply spiritual inspiration. As a soloist and with Ars Antiqua Austria, Letzbor has made numerous recordings (including several world premieres), featuring works by Mozart, Bach, Biber, Muffat, Aufschnaiter, Viviani, Schmelzer, Weichlein, Vejvanovsky, Vilsmayr and Conti. Particulary remarkable was his world's premiere recording of Sonate for violin solo by J.J.Vilsmayr and J.P.Westhoff.

less

Press

Play album Play album
01.
Concerto minor (transponiert): Ouverture
02:37
02.
Concerto minor (transponiert): Allemande
01:12
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
03.
Concerto minor (transponiert): Courente
01:15
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
04.
Concerto minor (transponiert): Sarabande
02:15
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
05.
Concerto minor (transponiert): Menuette
00:50
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
06.
Concerto minor (transponiert): Gigue
01:17
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
07.
Concerto minor (transponiert): Menuette
00:56
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
08.
Concerto minor (transponiert): Bourée
00:43
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
09.
Concerto minor (transponiert): Retirada
03:23
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
10.
Aria C Major: Aria
01:06
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
11.
Aria C Major: Allemande
00:53
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
12.
Aria C Major: Courente
01:03
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
13.
Aria C Major: Sarabande
00:58
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
14.
Aria C Major: Gavotte
01:05
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
15.
Aria C Major: Bourée
01:05
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
16.
Aria C Major: Menuette
01:07
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
17.
Aria C Major: Gigue
01:15
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
18.
Toccata F Major
07:50
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
19.
Concerto F Major: Ouverture
04:15
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
20.
Concerto F Major: Aria/Pastorale
01:24
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
21.
Concerto F Major: La Querelle des Amantes
01:20
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
22.
Concerto F Major: Menuette en canon
00:40
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
23.
Concerto F Major: Capricio en canon
00:59
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
24.
Concerto F Major: Gigue
01:05
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
25.
Concerto F Major: Menuette
01:18
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
26.
Concerto G Minor: Allemande et Gigue
03:17
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
27.
Concerto G Minor: Courente et Menuette
02:08
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
28.
Concerto G Minor: Sarabande et Aria
03:01
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
29.
Concerto G Minor: Gavotte et Bourée
01:27
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
30.
Symphonia G Minor
06:48
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
31.
Concerto C Minor: Ouverture
04:10
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
32.
Concerto C Minor: Allemande
02:40
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
33.
Concerto C Minor: Courente
01:33
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
34.
Concerto C Minor: Sarabande
02:16
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
35.
Concerto C Minor: Menuette
00:37
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
36.
Concerto C Minor: Gavotte
00:47
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
37.
Concerto C Minor: Menuette
01:00
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
38.
Concerto C Minor: Gigue
01:29
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
39.
Concerto C Minor: Bourée
00:40
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
40.
Concerto C Minor: Retirada
03:59
(Wenzel Ludwig Edler von Radolt) Ars Antiqua Austria, Gunar Letzbor, Hubert Hoffmann
show all tracks

Often bought together with..

Frantisek Jiranek, Antonio Vivaldi
The Four Seasons
Ars Antiqua Austria / Gunar Letzbor
Heinrich Ignaz Franz Biber
Sonatae Tam Aris Quam Aulis Servientes
Ars Antiqua Austria / Gunar Letzbor
Heinrich Ignaz Franz Biber
Fidicinium Sacro-Profanum
Ars Antiqua Austria / Gunar Letzbor
Joseph Haydn, Karl Kohaut
Haydn's Lute Player
Ars Antiqua Austria / Gunar Letzbor
Johann Sebastian Bach
Weihnachts-Oratorium
Combattimento Consort Amsterdam

You might also like..

Various composers
Concerts at the abbey of Schlägl
Ars Antiqua Austria | Gunar Letzbor | Erich Traxler
Antonio Bononcini
Cantate per Contralto con Violini
Ars Antiqua Austria
Amandus Ivanschiz
Chamber music at the Abbey of Lambach
Ars Antiqua Austria
Johann Matthias Sperger
Double Bass Concertos
Ján Krigovsky | Collegium Wartberg 430
Franz Joseph Aumann
Chamber Music in the Abbey of St. Florian
Ars Antiqua Austria