Timbre (pronounced like “TAM-ber”) is the unique quality or color of a sound that lets you tell different voices and instruments apart, even when they're playing the same note at the same volume. It's what makes a trumpet sound like a trumpet and not like a violin, even if they're both playing middle C.

Think about how you can recognize your friend's voice in a crowded hallway before you even see them. That's timbre at work. Your friend's voice has a distinctive quality that's different from everyone else's, just like your own voice has its own special sound that makes it uniquely yours.

Timbre comes from the particular blend of vibrations each instrument or voice produces. A piano and a guitar playing the exact same note sound completely different because of their timbre. The piano's hammers striking strings create one mix of vibrations, while plucked guitar strings create another.

Musicians and sound engineers pay close attention to timbre when recording music or creating sound effects. A flute has a light, airy timbre, while a cello has a rich, warm timbre. Composers choose instruments carefully based on their timbre to create the exact mood and feeling they want. When you describe a voice as scratchy, smooth, or bright, you're actually describing its timbre.