NLMS Music Summer School offers a wide choice of musical groups for players and singers to choose between, based upon skill and experience, from beginner to expert. The formal groups are:
- Symphony Orchestra – for skilled, experienced players
- Sinfonietta – for less experienced musicians
- Choir – a wide mixture of musical types for singers
- Brass Ensemble – Dedicated ensemble practice as well as work in both main orchestras
- String Group – for less experienced or confident string players
A variety of Open Sessions is also available, intended for anyone to join.