Aeternus Brass offers a comprehensive collection of virtual brass instruments, featuring solo trumpet, trombone, tuba, French horn, flugelhorn, and cornet. It provides a rich selection of brass sections and orchestral ensembles that capture the authentic sound of traditional brass. The library includes detailed sampled articulations such as legato and staccato, allowing musicians to create expressive and dynamic performances with ease.

In addition to classic brass sounds, Aeternus Brass introduces four analog brass instruments inspired by iconic polyphonic synthesizers. These synth brass options expand the sonic palette, offering unique textures that blend vintage electronics with traditional brass timbres. The instrument also features a brass mode selector with multiple ensemble variations, including staccato hits and special effects, enhancing creative possibilities for composers and producers.

The VST includes advanced sound-shaping tools such as an ADSR envelope generator, low-frequency oscillator with modulation controls, and a dedicated filter section. A wider spatial auralization effect enriches the stereo field, providing a broader and more immersive listening experience even without added reverb. With its diverse brass sounds and flexible controls, Aeternus Brass suits a wide range of musical styles and production needs.