The characteristics of his music...
The titles of his pieces often originate in literature. A title is a borrowed idea, a challenge, a reinterpretation, a source of inspiration as well as an elective affinity.
The contrast between a meditative sonority on the one hand - where chords suggest an ethereal atmosphere - and very nervous instrumental passages on the other hand, which require a high-level capacity of interpretation. While he is composing, Claude Lenners likes keep in mind the personality of the musicians he writes for.
The importance of timbres in the combination of instrumental colours as well as in techniques of composition.
An advanced research in the domain of phrasing, inspired by his studies of the phonetic phenomena of spoken language.