All Alto clarinets are played with Alto clarinet mouthpieces. It has about the size of an alto saxophone mouthpiece but a cork-covered tenon for the neck of the instrument. You can also play alto saxophone reeds on 59 " target="_blank">alto clarinet mouthpieces . 82 " target="_blank">Find the right swab With basset horns that's a different story. Originally the basset horn in F has had a smaller bore and was played with a clarinet mouthpiece. The idea was to have an instrument with a clarinet sound but a wider range. The Instruments from Steven Fox and Selmer are still using the clarinet mouthpiece. This basset horns create a more intimate sound. Leblanc was the first who build basset horns with a wider bore to get more volume. His instruments had the alto clarinet mouthpiece. They played freer and didn't have the nasal small sound of the smaller bored basset horns. The Leblanc´s have been for a very long time the first choice for many players. Buffet built in mid-1970 their first wide bore basset horn. But instead of using an alto clarinet mouthpiece, they modified clarinet mouthpieces, so that their inner bore was wide.