Question

What is the difference between pitch and timbre

Answer 1

Pitch is related to the frequency ..low pitch ,high pitch

while timbre means the QUALITY OF THE SOUND
If the pitch and loudness is same for a source then Timbre can be used to identify the quality of that particular sound source.

Answer 2

Pitch is the quality of sound which makes some sounds seem "higher" or "lower" than others. Pitch is determined by the number of vibrations produced during a given time period. The vibration rate of a sound is called its frequency the higher the frequency the higher the pitch.

Timbre is the quality of sound which allows us to distinguish between different sound sources producing sound at the same pitch and loudness. The vibration of sound waves is quite complex; most sounds vibrate at several frequencies simultaneously. The additional frequencies are called overtones or harmonics.