Brass I is a distinguished collection within the Symphonic Cube series, offering a rich selection of brass instruments including trumpet, Viennese horn, tenor trombone, and tuba. The collection also features ensembles such as trumpet ensembles of three players, horn ensembles of four players, and trombone ensembles of three players. This range provides a comprehensive palette for orchestral brass sounds, suitable for creating authentic symphonic textures and detailed brass arrangements.

The collection excels in delivering expressive performances through a wide array of articulations and playing techniques. It supports interval performances with legato and marcato styles at different speeds, as well as glissandos for horns and tenor trombone. Repetition options include legato, portato, staccato, and dynamic crescendos or diminuendos. Additional performance features include grace notes for solo instruments, arpeggios, trills, and muted or stopped note articulations, allowing for nuanced and dynamic brass expression. Various short and long notes with different attacks, vibratos, and dynamics further enhance realism and musicality.

Powered by the Vienna Instrument Engine, Brass I benefits from advanced streaming technology that enables efficient handling of large sample libraries with low load times and minimal resource use. The engine supports a vast number of articulations on a single MIDI channel, offers intuitive performance detection, and allows seamless switching between articulations without interrupting play. Users can customize presets, layer articulations, and control expression through MIDI hardware, making Brass I a powerful tool for composers and producers seeking detailed and authentic brass instrument sounds.