In this material, sthayi (octave) is described as what?

• A. Holding the same pitch
• B. Jumping between registers randomly
• C. Increasing the frequency of a musical sound
• D. Describing tempo fluctuations

Answer: (C)

An octave is about the pitch going higher by doubling the frequency. When you rise one octave, you hear the same note name, but its frequency is twice what it was, so the sound repeats in a higher register while retaining its character. That’s why describing the octave as increasing the frequency of a musical sound is the right fit. The other ideas don’t describe an interval at all: holding the same pitch means no frequency change, jumping between registers is a random movement not an interval definition, and tempo fluctuations relate to rhythm, not pitch.