Musical sounds are characterized by four key properties: pitch, loudness, quality (timbre), and duration. Pitch refers to the highness or lowness of a sound, determined by its frequency. Loudness, or intensity, describes how soft or loud a sound is, and is determined by the amplitude of the sound wave. Timbre, or quality, refers to the unique sound color of a sound, allowing us to differentiate between instruments or voices. Finally, duration is the length of time a sound lasts. Here's a more detailed look at each property: Pitch:Higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches.Loudness:Larger amplitudes correspond to louder sounds, while smaller amplitudes correspond to softer sounds.Timbre:Timbre is determined by the complex pattern of overtones, or harmonics, produced by a sound source.Duration:Duration is the length of time a sound persists.