This demonstration explores the human ability to detect a specific musical instrument within a musical mixtures. It specifically highlights the role of prior knowledge & attention: In the "Target first" condition, hearing the isolated instrument creates a mental template (auditory schema) that helps the listener track the instrument within the mixture. In the "Mixture first" condition, this prior guidance is missing, making detection more dependend on the instrument's ability to stand out of the mixture. By adjusting the Target-Level Ratio, you can experience how signal intensity and presentation order interact to influence your detection accuracy.