When we sing words we change the shape of our mouth, which is the space where the tones of our vocal cords pass through. Usually musical instruments don‘t have such an easily modifiable space where the sound passes through.
However, you can attach a tube to the speaker of your instrument, put that in your mouth and then say words (without your voice) while the instrument is playing. This is called a talkbox and it‘s a really fun way to play an instrument. Look it up on Youtube!
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