The quality of a note depends on its

Step 1: Analyze the question The question asks which property of a musical note determines its quality. Quality is also called timbre. It is what lets you tell a piano from a guitar when both play the same note.

Step 2: Explain the concept A sound has three main characteristics:

• Pitch depends on the frequency. A higher frequency gives a higher pitch.
• Loudness depends on the amplitude (and intensity).
• Quality (timbre) depends on the number and strength of the overtones (harmonics) mixed with the fundamental note.

Most instruments do not produce a pure fundamental tone. They also produce overtones at higher frequencies, and each instrument has its own pattern of overtones. This pattern gives each instrument its distinct sound, or quality.

Step 3: Check each option

• A. Frequency: This determines pitch, not quality.
• B. Pitch: This is a separate characteristic of a note, not what quality depends on.
• C. Overtones: Correct. The presence and relative strength of overtones determine quality.
• D. Amplitude: This determines loudness.

Step 4: Answer The quality of a note depends on its overtones, which is option C.

Exam tip: Remember the matching pairs:

• Pitch → Frequency
• Loudness → Amplitude
• Quality (timbre) → Overtones (waveform)