A musical journey that describes the human condition—from the torment and despair caused by one's own mistakes, to the acceptance of imperfection and the search for absolution. Through the works of Locke, Biber, and Bach, this variety of emotions is highlighted by the diversity of sonic textures provided by the combination of violin, cello, and piccolo cello.

"Erbarme dich!" represents a spiritual journey from torment to redemption, built around instrumental transcriptions of arias and sonatas by composer J.S. Bach, intertwined with the expressive depth of the works of Biber and Locke.

Ayres Extemporae is a group based in Belgium and the Netherlands. It consists of Moldovan-Spanish violinist Xenia Gogu, Spanish cellist Víctor García García, who plays the five-string cello, and Portuguese cellist Teresa Madeira. One of their innovative characteristics is their experimentation with basso continuo, inspired by research into the use of bowed string instruments in the bass during Corelli's time. Through ex temporae improvisation of countermelodies, ornamentation, and chord realization, they explore various effects in the music and the roles of each instrument, creating a variety of textures and colors based on the traditional instrumentation of the cello and harpsichord.