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Sternbilder - Astra II

2022, Opus 27

Trumpet in Bb, Bassoon, Accordion

The “Sternbilder – Astra” (“Constellations – Astra”) cycle is a setting of all the constellations recognised by the International Astronomical Union (IAU). Since 1922, the IAU has counted 88 constellations by a total of six authors (Bayer, Brahe, Hevelius, Lacaille, Planci-us and Ptolemy). In the cycle “Sternbilder – Astra II” (“Constellations – Astra II”), op. 27, six further constellations are set to music.

Each movement bears the title of a constellation named by the French astronomer Nicolas-Louis de Lacaille (1713 - 1762). Lacaille discovered and named a total of fourteen constellations still in use today. He often named his discoveries after technical achievements, and “Sternbilder – Astra II” (“Constellations – Astra II”) is dedicated to all those constellations that were named after just such achievements.

A central idea that runs through all the movements is repetition. On the one hand, the repetition of motifs, rhythms and small melodies, on the other hand, sounds that recur one after the other (as for example in “Grabstichel – Caelum”). This reflects the recurring appearance of constellations every night.

The first versions of “Pendeluhr – Horoglium” were written for solo piano in 2020. In spring 2022, the movement was rewritten for the present instrumentation. The movements “Chemischer Ofen – Fornax” and “Winkelmaß – Norma” were composed in July 2021 and were also originally written for piano. The remaining three movements were composed between December 2021 and January 2022 and were written directly for the present instrumentation.

The movements “Grabstichel – Caelum”, “Mikroskop – Microscopium” and “Teleskop – Telescopium” were composed on the occasion of the competition “Jugend komponiert 2022” (“Youth composes 2022”) of the Austrian Composers Association (formerly ÖKB). On
19th March 2022, the work was premiered in the small studio of the Mozarteum Salzburg by András Gergely Gerhardt, Petra Seidl and Karin Küstner as part of “ASPEKTE Salzburg” and won 2nd prize in age group II.

Chemischer Ofen - Fornax

In the first movement it is bubbling and foaming like in a witch’s oven. When experimenting and researching with chemicals, it is sometimes impossible to tell what substance will emerge next. The “Chemische Ofen – Fornax” is intended to describe, by means of its own tone series, this brief moment when a chemical experiment is carried out.

Winkelmaß - Norma

In order to be able to determine the size of an angle, one can use an angle measure. “Winkelmaß – Norma” is meant to be a progressive sound picture, where piece after piece is hung, quasi one angle after the other.

Grabstichel - Caelum

A graver is a tool mainly for metal and woodwork. It is used to work and touch up over and over again. In “Grabstichel – Caelum”, an attempt was made to represent this work with repetitive tones and loud sounds of the entire ensemble.

Pendeluhr - Horogolium

The recurring click of a pendulum clock is always exactly in rhythm and almost meditative. In the fourth movement, “Pendeluhr – Horogolium”, however, it is not a working pendulum clock that is set to music, but one that is getting a little long in the tooth. Recurring sound movements seem to be rhythmically shifted a little each time, quasi out of time.

Mikroskop - Microscopium

When you look through a microscope, you see the world much bigger or discover something that you could not see with the naked eye. Perhaps you also catch a glimpse of life and can detect the heartbeat?

Teleskop - Telescopium

With a telescope you can look far into the distance. One is gripped by the spirit of adventure to explore and investigate this distance. The last sentence is meant to capture and capture this beginning of a new journey. This is precisely why this fanfare-like movement is at the end of the work.


2021, Opus 23

Oboe, Clarinet in Bb, Horn in F, Bassoon, Piano

The musical idea “Engrossed” is intended to reflect one’s own perception of the Corona pandemic and the associated lockdowns. The work in three movements is based on a series of paintings by my father, Martin Chroust, who painted them during the Corona pandemic. Two of the three pictures were taken in the period from March to April 2020, the third in April 2021, the music in the period from May to June 2021. The title “Engrossed” refers to the enraptured living conditions of everyone due to the pandemic. The names of each movement do not correspond to the original names of the paintings due to different circumstances.


based on the painting "Lockdown Blues #1"

The moment should capture the new situations that now affect everyone. Many areas, especially those such as gastronomy, hotels and culture are forced to come to a complete standstill. Social contacts are also put to the test, you are only allowed to leave your own four walls under a few circumstances. Due to the lack of vaccines and lack of information about the virus, the near future is still uncertain.


based on the painting "Hastu Bücher hastu Welten"

So that one’s own roof doesn’t fall on one’s head in one’s limited free time, one entertains oneself with good books. You jump and switch between many pages and stories, some are romantic, some are more exciting than a thriller. While individuals get bored over time, the huge world of stories and tales is open to everyone, where everyone can certainly find something to their taste and experience real adventures in their heads.
Fordernde Pilaster

Demanding Pilasters

based on the painting "Lockdown Blues #2"

In the end, unfortunately, exactly what happened that you originally tried to avoid: the time in your own four walls has become an unbearable odyssey. The apartment feels like your own prison, from which you just want to break out. The screams for normalcy are getting louder and louder, but the only thing to do is wait. Even if it seems like it’s over, it’s actually not over yet.

Summer Nights

2021, Opus 21

Flute, Clarinet in Bb, Piano

The summer nights describe two scenes from a mild, as the title suggests, summer night in Arles. People are on the street, laughing, drinking, dancing solemnly and enjoying the local street cafes.
Zur Abenddämmerung

At Dusk

The story behind the two pieces basically relates to the space. In the first piece, strolling through the streets, where someone is playing the trumpet and where someone else is making their way home.
Zu später Stunde

Late at Night

The second scene describes the experience in a night café. This image should convey a relaxed atmosphere next to a billiard table, where wine or other spirits are consumed.
Sternbilder - Astra

Constellations - Astra

2021, Opus 20


The International Astronomical Union (IAU) has recognized 88 zodiac signs since 1922. In scientific contexts, some factors are given for a named constellation, in this case only the English and Latin nominative are mentioned (if the names are congruent, it is only written once). There are also small explanations of the background to the names.

Opus 20 contains only 8 of 88 zodiac signs, whereby these are again related in two independent Greek mythologies. The corvus, the crater and the hydra are thematically related, as are Cassiopeia and four other unpublished constellations.

Rabe - Corvus


In Greek mythology, the raven is said to have been prevented from fetching water for Apollo.
Becher - Crater


The raven should have brought water for Apollo in the crater.
Wasserschlange - Hydra


The water snake prevented the raven from fetching water for Apollo with a cup.

Kassiopeia - Cassiopeia

Cassiopeia was the wife of Cepheus in Greek mythology and was of an extremely beautiful figure. She claimed to be more beautiful than the Nereids and so drew the wrath of Poseidon.


Perseus is the son of Zeus and Danae. In Greek mythology, he rushed to the aid of the beautiful Andromeda, who was to be sacrificed to the sea monster Ketos. In gratitude, she became a woman.
Fünf kleine Momente

Five Little Moments

2020, Opus 19

Alto Saxophone, Piano

The cycle “Five Little Moments” describes five little, almost insignificant scenes that can easily be forgotten.

At the moment only the “First Little Moment” has been published.

Erster kleine Moment

First Little Moment

The first moment describes a very light drizzle over a city. The mood is quite gloomy, but sometimes the sun shines through.
Fünf Terzinen für Schwärmer

Five Terzines for Swarmers

2021, Opus 17

Flute, Oboe, Clarinet in Bb, Horn in F, Bassoon

The night is a place of reverie. Some people find their most exciting thoughts in their sleep, others deal with a seemingly simple everyday situation. But there is more to sleep than a world of dreams. A world opens up to beings who do not exist in the real world. Unreal situations happen and pass. However, to plunge into the depths of the night it takes more than a moment or a moment of reverie. It takes a certain amount of time to get involved in the situation, and the daydreaming affects the active consciousness well into the morning.

The cycle follows the literary form terzine. The first movement consists of parts A-B-A, the second from B-C-B, the third from C-D-C, the fourth from D-E-D and the last from E-A-E-A.

Das Schiff am Meer

The Ship by the Sea

The ship by the sea that has already plunged far into the Atlantic. It is very active on the ship, just like in the city, and a lot of people consume luxury goods such as casinos or expensive restaurants, it feels less like a ship, more like a small town with lots of personalities. It seems like everyone has known everyone their whole life. Rarely, but sometimes you can feel a bigger wave breaking through the ship.

The waves outside are typical and correspond to many imaginations, not moving wild, beautiful but not at ease, high but not scary.



2019, Opus 13

Violin, Violin, Viola, Violoncello

The Winter Quartet describes a typical winter landscape, consisting of various elements such as icicles, a fir tree, a skiing landscape, etc. The sum of all these elements is what makes up the composition of the Winter Quartet, or rather what I as the composer associate with the term “winter”. But it’s also important to me that each single winter element has a story of its own, which I have tried to highlight and to incorporate into the overall context.

Shape the Future Waltz

2019, Opus 11

Violin, Violoncello, Piano

With this piece I set the child right “right of each child to education and training to promote its talents”. I personally think that this right is of particular importance, because I believe that each child has hidden talents that need to be discovered.


2018, Opus 8.17

Violin, Piano

“Atlantic” is the 17th piece of the story WHITE that I am telling by musical means. In this part of the story the crossing of the Atlantic Ocean changes the life of the main character. The story is set at a time when this crossing was dangerous. In the whole story the piano represents the protagonist, while the other instruments represent external circumstances, as does the violin in this piece as the more dominant voice. In the story, the protagonist wants to fetch his family from Brazil and bring them to France. During the long journey he thinks a great deal about how his huge family will fare in a small French village. Before the crossing, he and his sister were the only colored people there and were little respected.

  1. Part A, piano and violin: The protagonist has reached his mental and physical limit, but still he manages to pull himself together time and again. The violin reflects the changing swell of the waves, at times big, small, light or heavy.
  2. Part B, piano: The protagonist becomes even more aware of the current and future situation in France and Brazil, and his emotions overwhelm him.
  3. Part A’, piano and violin: The emotional situation calms down again, but the swell of the waves is higher than ever, as the violin tells us, rising by an octave. What the crossing will result in remains open to the listener, and each one is left to interpret for her- or himself. We only know for sure that the passage succeeds.
7. Jänner

January 7th

2018, Opus 4

Piano for four hands

On January 7, 2018, my brother went abroad for six months. The piece for four hands describes my feelings and deals a little with the farewell for a long time.

Con Espressione





2017, Opus 3


The piece is related to a story drafted at the time. Another, previously unpublished piece is also included.