is a Basque countertenor and cellist. David Sagastume Balsategui was born in Vitoria in 1972. He studied high school at the Federico Baraibar Institute in Vitoria. His musical training is linked to the Jesús Guridi Conservatory of Vitoria, where he studied cello and obtained the Extraordinary Prize for the specialty upon completing his higher degree; He also studied harpsichord and viola da gamba, chamber music, harmony and composition. Some of his teachers during that period were Gabriel Negoescu and François Monciero.1​2​ He combines his studies with interventions as an instrumentalist member of the “Jesús Guridi” Instrumental Ensemble, fundamentally dedicated to the interpretation of music from the 20th and 21st centuries. For several years he has belonged to the EGO Euskalerria Youth Orchestra, and collaborated regularly with the Euskadi Symphony Orchestra. As such he has performed at festivals such as the Donostiarra Musical Fortnight or Musikaste de Rentería. He completes his instrumental training by attending various international courses, receiving advice from teachers such as Sigfried Palm, Laurentius Sbarcia, Radu Aldulescu and Hanno Simons. He has attended chamber music classes with teachers Juan José Mena and José Luis Estelles3​4​ At the same time, he begins to work as a countertenor with teacher Isabel Álvarez; studies that he continued with R. Levitt and Carlos Mena. He has performed regularly with the Capella Reial de Catalunya, under the direction of Jordi Savall, participating in various productions such as Vespro of the Beata Virgine by Claudio Monteverdi or the Mass in B minor by J.S. Bach. He has performed at various festivals and concert halls around the world such as the Flanders International Festival, Fontevraud, San Sebastian Musical Fortnight, Cuenca Religious Music Week, Álava Early Music Week, Styriarte de Graz, Berkeley Festival, International Music Festival of Cartagena de Indias, Misteria Paschalia, Sydney Opera House, Concertgebouw in Amsterdam, Walt Disney Concert Hall in Los Angeles, Konzerthaus in Vienna or the Palace of Versailles. He participated in Herbert Wernicke's production of Handel's opera “Giulio Cesare”, directed by Andreas Spering at La Maestranza in Seville.5 For a long time he has sung as a soloist with groups such as Los Ministriles de Marsias, the Baroque Orchestra of Salamanca, the Baroque Orchestra of Seville, the City of Granada Orchestra, the Malaga Philharmonic Orchestra, the Prussian Chamber Orchestra or The Orchestra of the Age of Enlightenment, Concert Français, Café Zimmermann and Netherlands Bach Society under the direction of Gustav Leonhardt. He also performs regularly with La Grande Chapelle, Les Sacqueboutiers de Toulouse and the Ensemble Gilles Binchois. He has made a multitude of recordings, both in groups and as a soloist, among which it is worth highlighting: the Missa Sine Nomine by Johannes de Antxieta, Missa Salisburgensis by Biber, the Agenda Defunctorum by Juan Vásquez, the Puer natus est mass by F. Guerrero, Ensaladas by Mateo Flecha, the CD “Penomous Serpent”, with the Baroque Orchestra of Seville and others, in addition to several others made for different European radio stations (Radio France, R2…).6​ He regularly participates in Alia Vox recordings in recent years, taking part in the first album released by said company on its Alia Vox Diversa label as a member of Euskal Barrokensemble.7 He is a founding member of the group Intonationes, specialized primarily in the interpretation of the Hispanic polyphonic repertoire of the 16th and 17th centuries.8 As director of this group, he has carried out the work of recovering and transcribing a Magnificat that was believed to be incomplete by the Basque musician Johanes de Antxieta. , expanding the extraordinarily meager catalog (16 works with the newly discovered one) of one of the most important musicians of the Hispanic 15th century.9​