Tuning devices are tools used to adjust the pitch of musical instruments, ensuring they sound correct. For example, a guitar tuner helps musicians find the right notes by indicating whether a string is too high or too low. These devices can be electronic, clip-on, or even smartphone apps, making it easy for anyone to keep their instrument in tune. In addition to string instruments, tuning devices are also essential for pianos and brass instruments. A well-tuned instrument enhances the overall sound quality, making music more enjoyable for both the player and the audience. Proper tuning is crucial for musicians of all skill levels.