If they aren't speaking at all, you could want to try tightening up a bit bit, in order that the reed might be able to vibrate more. If you're having bother with notes from the 1st B over the break and up, then the challenge could be various things. The clarinet is a transposing instrument. The basset horn, a sort of alto clarinet, was much used by Mozart and was revived by Richard Strauss. Clarinets were once made in other keys, but all of those contraptions at the moment are out of date. The E flat alto and the E flat contrabass clarinets are mainly band instruments. LAUREL 4 Bb SOPRANO CLARINET REEDS - STRENGTH 4 - BOX OF 10