In May 2015, a portrait concert of Lentz's music by the Munich Chamber Orchestra at the Pinakothek der Moderne included the world premiere of the definitive version of Birrung (1997–2014) for 11 strings.

The Cobar Sound Chapel was designed by Pritzker Prize-winning Australian architect Glenn Murcutt in collaboration with the composer, with its architecture reflecting rhythmic and structural patterns found in String Quartet(s).

Lentz's music expresses his fascination with astronomy as well as his love of the Australian Outback and Aboriginal art (in particular the works of Kathleen Petyarre), and reflects his spiritual and existential beliefs, questions and doubts.

The Vale of Glamorgan Festival (UK), where Lentz was a featured composer in 2006, introduced his music as "...an awestruck and almost fearful response to the beauties and mysteries of the universe; a massive, personal creative undertaking from which this intense, almost obsessive composer is painstakingly extracting concert works...a unique voice whose music is genuinely moving despite its brittle austerity and unearthliness, and captures some of the most evocative silences imaginable."

Lentz's music shows the influence of the French Spectralists and, to some degree, the New Complexity movement (unusual instrumental combinations, extended playing techniques etc.).

While it is not clear why Lentz has adopted this idiosyncratic system, the textures and colours (occasionally with delicate layers of computer-generated sounds) superimposed over the top of these rigid "grids" often give it a shimmering or 'twinkling' quality.

Ingwe also contains, for the first time in Lentz's output, a short section that relinquishes strict control over the musical material and gives some improvisational freedom to the performer.

In the final analysis Lentz's music, born from "total silence and radical isolation – at the very real risk of hearing nothing at all" (composer's website), seems to be torn between feelings of awe and an over-riding struggle with spiritual doubt and existential loneliness.