In addition to changing the pitch, a slide can also change the timbre of the sound. This is because the slide changes the way the sound waves vibrate inside the instrument. The different timbres that can be produced with a slide can be used to create different musical effects.
Slides are often used in jazz and other improvised music, as they allow the musician to quickly and easily change the pitch of the sound. They are also used in classical music, where they are used to create specific musical effects.
Here are some specific examples of how the sound of a trombone changes when a slide is used:
* The pitch of the sound changes. The higher the slide is pulled out, the lower the pitch of the sound. This is because the longer the instrument, the lower the pitch of the sound.
* The timbre of the sound changes. When the slide is pulled out, the sound becomes more mellow and softer. This is because the longer the instrument, the more the sound waves are spread out, which results in a more relaxed sound.
* The articulation of the sound changes. When the slide is pulled out, the sound becomes more legato and smooth. This is because the longer the instrument, the more time the sound waves have to vibrate, which results in a smoother sound.
Overall, the use of a slide on a trombone can greatly change the sound of the instrument. This can be used to create a variety of musical effects, from low, mellow sounds to high, bright sounds.