Sarah Kollé
The dutch-swiss soprano Sarah Kollé was from 2009 until 2011 a member of the Youth Choir of the Opernhaus Zürich with which she took part in various opera performances.
From 2011 till 2014 she studied with Prof. Jane Thorner-Mengedoht at the Zürcher Hochschule der Künste (ZHdK) where she obtained her Bachelor degree in 2014 with distinction. From 2014 untill 2016 she continued her studies as a member of the Schweizer Opernstudio at the Theater Biel/Solothurn. There she performed various roles, including Emmeline (Die Schweizerfamilie, Weigl), Despina (Cosi fan tutte, Mozart), Serpina (La serva padrone, Pergolesi) and Lucy (The telephone, Menotti) and Morgana (Alcina, Händel). In the season 2015/16 she made her debut at the Theater Biel/Solothurn with the role of Oberto (Händel, Alcina).In the season 2016/17 she performed the role of Woglinde (Das Rheingold, Wagner) in a studio version, appeared in the Kurt-Weill Fest with the Bachianas Brasileiras No. 5 (Villa-Lobos) and has sung an Operettenkonzert with the Leipziger Symphoniker. In June 2016 she performed the role of Sie (Minibar, Daigger) with the Junge Noddeutsche Philarmonie. Since 2016 she continued her studies with Prof. Caroline Stein at the Hochschule für Musik und Theater Leipzig and obtained her Masters with distinction in July 2018. 2018/19 she performed Sesto(Giulio Cesare, Händel) at the Theater Dessau and Nordhausen, and sang Hanne(Die Jahreszeiten, Haydn). Sarah Kollé took part in masterclasses with Valérie Guillorit, Peter Berne (Belcanto), Regina Werner-Dietrich and Edda Moser. 

Alexander Boeschoten
Swiss pianist Alexander Boeschoten was born in 1989 in Bern, where he began taking piano lessons at the age of six with Walter Prossnitz and then Benjamin Engeli.

Moving then to Zürich, he continued his classes at the Zürich Conservatory with Daniel Knecht and began university studies with Prof. Homero Francesch at the Zürcher Hochschule der Künste where he graduated in 2012 with a Master of Arts in Music Performance. He continued his studies in the class of Ronald Brautigam at the Hochschule für Musik Basel. He received chamber music tuition from Adrian Cox, Stephan Goerner, Thomas Grossenbacher, Ferenc Rados, Zakhar Bron, Valentin Erben and Thomas Demenga.

Alexander won his first competition in 2007, obtaining the 1st Prize at the Swiss Youth Music Competition. In 2010 he gave his debut at the Tonhalle Zurich. In 2011 followed the first radio recordings with the ORF. In the summer of 2005, he gave his first solo recital with which he traveled through the Netherlands. Other following concerts tours took him through Romania to Russia, Germany, Italy, Japan, France, Austria and Switzerland, where he performed both solo recitals and with orchestras.

Alexander Boeschoten is also a very active chamber musician, performing in festivals such as Davos Festival, Boswiler Sommer, Mantova Chamber Music Festival and the Rüttihubeliade, where Alexander was a regular guest since 2008 and performed among others with musicians such as with Duncan McTier, Vladimir Mendelssohn, Maximilian Hornung and Thomas Demenga.He is currently teaching at the Conservatory in Zürich (MKZ) and is the Artistic Director of the succesfull concert series Zunftkonzerte Zürich since 2018.