The only professionaly used plastic instruments I have seen are recorders and flutes. Although no serious recorder/flute player would prefer their sound they ca

The only professionaly used plastic instruments I have seen are recorders and flutes. Although no serious recorder/flute player would prefer their sound they can be quite good, especially because they are tuned higher than normal recorders which are tuned way to low. (This is why they sound so bad when playing with other instruments.) I habe also seen tubists use acrylic mouthpieces.