Many novice arrangers leave the Repiano doubling the Solo cornets constantly. Use the Repiano to fill the sonic gap between the high Solo cornets and the lower 2nd/3rd cornets.
Expert arrangers avoid using the full ensemble constantly, instead utilizing solos, unisons, and chamber-like textures to prevent listener fatigue and highlight structural shifts. Key Choice: scoring and arranging for brass band pdf
Remember that copying a B♭ Trombone part into a Bass Trombone part requires a complete clef and transposition shift. Writing a treble-clef B♭ part for a Bass Trombone player will cause immediate confusion at the first rehearsal. Many novice arrangers leave the Repiano doubling the
Example layout for a chorus: