Solution to #4: How Do I Know My Young Brothers

    The text suggests that reading the sheet music as notes and including or accounting for the dynamics (in this case, the "mp" symbol) would be useful. However, the letters alone do not spell anything when strung together. The key hint here is the final sentence. Each performance should stand out the most when no other instrument is playing, so it is only the notes which are played at that time which matter. They must be arranged "in harmony" or according to their time in the song rather than according to their line.
    This spells "damp facade" which along with the reference to an engineering music recital happens to answer the title's question. Young engineers are known by purple dye, and the answer is "purple".


PURPLE