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Irrevocable Posts

Singers wanted!

For our next project we’re looking for singers! We have temporary places for female voices, with a preference for altos. Our next project starts at the end of januari 2024 and our program will be about temptation.

Are you curious about singing with Irrevocable and have wanted to see if you’re a good fit? We have open rehearsals on Thursday 30 November and Thursday 7 December from 19:30 to 22:00. Our rehearsals take place in the Speeltuin Westerkwartier in Leiden, Ten Katestraat 10A. We’re organising auditions on Tuesday 12 December!

Do you want to join one of these rehearsals? Let us know via

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Birds of Song

They chirp and splash and fly and sing: The animal kingdom is full of strange birds. Join Vocal Ensemble Irrevocable on an expedition. In this joyful concert we celebrate the beauty and diversity of nature and explore the winged animals of the city, the forest and the imagination.

On this expedition, the choir will be accompanied on the grand piano by former choir member and virtuoso pianist Chloe Martindale. There will, of course, be a cappella beauty as well! As always, it promises to be a diverse concert featuring music of all eras. You will be able to enjoy works by Eric Whitacre, Josquin des Prez, Clément Janequin, Jonathan Dove and Imco de Gier, among others.

Friday November 17
20:00 h
Lutherse kerk
Noordeinde 4, Delft
Saturday November 18
20:00 h
De Utrechtse Muziekschool (DUMS)
Domplein 4, Utrecht

Doors open at 19:30 h for both concerts.

Regular €17,-
Student €12,-

Tickets are available through our webshop with €2,- discount in the pre-sale. The online pre-sale will close on November 16, 20:00 h. Tickets are also available at the door.

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Irrevocable needs singers for Birds of Song!

We’re no longer looking for singers, but if you’re interested in joining Irrevocable, please send us a message and we’ll keep you posted about open positions!

Irrevocable is looking for enthusiastic chamber choir singers (alto/tenor/basses) for our upcoming project Birds of Song in November 2023.

Vocal Ensemble Irrevocable consists of 16 young and enthusiastic singers from Leiden, The Hague and Delft. Twice a year we organise concerts, like in our previous projects: Ils Dorment, Geen Woord te Veel, Steeds Verrassend Altijd Voorbeeldig and Lux et Nox.

Our next concerts for our project ‘Birds of Song’ will take place on Friday 17 November in Delft and Saturday 18 November in Utrecht. More information about these concerts will follow soon!

Are you interested in joining? We’re currently looking for altos, tenors and basses! The project starts in September 2023. Auditions will take place on September 5th. If you’re interested in joining please send us an email through

You can also follow us on Facebook, Instagram and Youtube! We post photos and videos of previous concerts, behind the scenes moments and all updates regarding upcoming concerts.

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Still. A Memorial Concert

The online pre-sale is closed. You can of course still buy your ticket at the doors. Please be on time!

364 days a year, the Netherlands is a country in motion. But once a year we stop to gather in silence. Vocal Ensemble Irrevocable invites you to commemorate with us on the 4th of May, with two minutes of silence and with music. Loss, hope and peace come together in various pieces, where we not only commemorate the Dutch victims of war violence, but also all others that lost their lives to violence in times of war or peace, and those that still lose their lives.

The music will start after the national two minutes of silence, and was chosen by our singers and our conductor Wouter Verhage for their beauty and symbolic value. Commemorate with us, with music of, among others, William Byrd, James MacMillan, Tijs Hol and with A Ukrainian Prayer of John Rutter.

The memorial concert will be in the Petruskerk in Leiden (Lammenschansweg 40a, 2313 DM).

Start: 19.55, doors open 19.20.
Regulier €17,-
Student €12,-

Please, really be on time because of the 2 minutes of silence.

Tickets can be purchased in our webshop with €2,- discount. The online pre-sale will close on 19.00 on the 3rd of May. Tickets can also be bought at the doors before the concert

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Vocal Ensemble Irrevocable

Vocal Ensemble Irrevocable consists of 16 young, enthusiastic singers from the Leiden, The Hague and Delft region. Twice a year we perform concerts, such as our previous projects: Ils Dorment, Geen Woord te Veel, Steeds Verrassend Altijd Voorbeeldig and Lux et Nox.

Our next concert will take place on Thursday, May 4, 2023 in Leiden. This concerts is centered around the Dutch National Memorial Day. We will have more information on this program following soon!

Would you like to sing along with Irrevocable? We organize auditions for available positions at the start of projects (usually January or September). If you are interested to join us, please send an e-mail with some information about yourself to so we can contact you when we have a position in your voice group!

Also follow us on Facebook, Instagram and Youtube! There you can find photos and videos of previous concerts, behind-the-scenes looks and all updates on upcoming concerts.

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Lux et Nox

The sunrise heralds the day and ends the darkness. Where the sunset leads us into the night. What does that mean to us, these contrasts between day, night, light and dark? 

Vocal Ensemble Irrevocable presents Lux et Nox, a program in which we explore the contrasts between light and dark. In a unique setting we’ll perform music of Brahms, Whitacre, Diederik van der Laag and others with our conductor Wouter Verhage.

Friday November 4th
20.00 uur
Kanaalstraat 198
Saturday November 5th
20.00 uur
Herengracht 68-70

For both concerts our doors will open at 19.30.


Regular €16,-

Student €11,-

Tickets are available now in our webshop with a €2,- pre-sale discount! Pre-sale will be opened until 7 pm the day before the concert. Tickets will also be available at the door.

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Singers wanted!

Irrevocable is looking for enthusiastic chamber choir singers (alto/tenor/basses) aged 18-35, for our upcoming project ‘Van Nature!’ in May and June 2022. Together with conductor Kurt Bikkembergs and vocal coach Nicky Bouwers, we will explore the relationship between man and nature as it has been depicted in varying music from the past till current times.

Although you are not required to speak Dutch fluently, you do need enough understanding of the language to be able to follow rehearsals in Dutch. The rehearsal week (presence required) will take place on location from Friday evening the 27th of May to Friday the 3rd of June 2022. The concerts will be on the 3rd of June in Leiden and the 4th of June in Utrecht. On Sunday the 30th of January or Sunday the 6th of February, auditions will be held for this project in Leiden.

Contribution will be about €125,- for students and €175,- for those who have employment. This contribution includes your stay and meals during the rehearsal week.

If you are interested in joining, please fill in the following form by the 12th of January:

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Steeds verrassend, altijd voorbeeldig

Are you feeling tired or restless? Do you also occasionally feel overwhelmed by modern life? DON’T PANIC: Vocal Ensemble Irrevocable has found the solution!

Joining forces with conductor Wouter Verhage and barbershop quartet ‘Further ado’, we will perform dazzling works of Tallis, Tavener, Lennon and McCartney, amongst many others. Guaranteed to energize you and improve your wellbeing! Available soon in quality establishments near you. Do not miss this!

Leiden: Delft:
Friday 22nd of
20.00 h
Pieterskerkstraat 1
2311 SV Leiden
Saturday 23rd of
20.00 h
Lutherse Kerk
Noordeinde 4
2611 KH Delft

At both concerts the doors will open at 19.30h. We will check your Corona pass QR code at the door with help of the CoronaCheck Scanner app. You will need to show a valid ID for this check as well.

– regular €14,99
– students €9,99

An extra discount of €2,- is applied at pre-sale* check-out!

Even we are amazed by this extraordinary discount.

*Pre-sale will close 32 hours before the start of the concert.

The pre-sale ticket period has ended. It is still possible to buy tickets at the door.


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Irrevocable is participating in the Anjeractie!

We have been quiet for a while on our website. COVID-19 restrictions made it impossible for us to sing together, or perform any live concerts. This also impacted our finances…fortunately this time has also seen the start of beautiful initiatives! From the 28th of May until the 5th of June, the Prins Bernhard Cultuurfonds is holding a mobile collection through the Anjeractie for initiatives concerning culture and nature. Irrevocable is also participating this year! You can support us directly through the following link:

Of course, we did find ways to sing together this last period, even if we could not do this live. We produced two virtual choir projects, one of which is our interpretation of the ‘Ubi Caritas’ of Ola Gjeilo:

The other project we did was specifically produced for the 4th of May this year. It was a virtual performance of the piece ‘Ils dorment’ of composer Diederik van de Laag. This music is very dear to us, as Diederik wrote it for our ensemble to perform on our Remembrance concert in 2019. Diederik was so enthusiastic about this that he also made a recording for our video!

All of this would not be possible without the help of Imco Daniel of Rayscendo. Thank you for all the editing work, Imco!

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Geen Woord te Veel

Have you ever thought: ‘Beautiful music, such a shame I don’t understand the lyrics’? That won’t happen to you this concert! Featuring no lyrics, the concert employs universal language everyone can understand.

Come and experience dance, percussion and culture from all over the world (and from the great unknown). Music made with our common instrument: the human voice.

Vocal Ensemble Irrevocable presents, in collaboration with conductor Wouter Verhage: ‘Geen Woord te Veel’ (‘Not one word too many’). We’ll perform pieces and arrangements of, among others, Bach, Piazolla, Jenkins and Meredith Monk. Also includes the special composition ‘Aurora’  by Tijs Hol, one of our own.


Utrecht: Oegstgeest:
Friday 29th of November Saturday 30th of November
Start concert: 8.00 PM Start concert: 2.00 PM


Utrecht: Oegstgeest:
Lutherse Kerk
Hamburgerstraat 9
3512 NN Utrecht
Warmonderweg 2
2341 KV Oegstgeest

Admission: normal €15, students €10

The ticket pre-sale has ended by now. You can still buy tickets at the door (paying by card is possible).

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