Final answer:
Assuming the pitches are in unison, the texture is monophonic, characterized by a single melodic line without harmony. Timbre, which describes the unique quality of sound of an instrument, plays no role in the texture but contributes to the distinct sounds even when pitches are the same.
Step-by-step explanation:
When discussing the texture of music, the term denotes the overall quality of sound of a piece, including layers, types of voices or instruments, and how they interact. In the context of your question, assuming that the pitches are in unison, the texture is referred to as monophonic. Monophonic texture, or monophony, describes a single melodic line without accompanying harmony. This could be a group singing a single melody together, or an individual instrumentalist playing a solo without chords or other melodic lines. The concept of timbre, though not directly related to texture, is important as it explains why the same note can sound different on different instruments due to the unique set of frequencies and intensities they produce, giving each instrument its own characteristic sound. Terms like dull, brilliant, warm, and rich are used to describe the timbre and contribute to the distinctness of sound despite the pitches being in unison.