What are all the different registers on clarinet?
and what notes are in them?

Sorry never ever been told.

x

Try having a look at these:-

http://hem.passagen.se/eriahl/faq.htm

http://cnx.org/content/m12604/latest/

Don't think I'd trust either of those references. The first one tried to download spyware (according to my McAfee security software); and I've never heard of the 'extreme' or 'throat' registers the second one talks about.

As far as I know the clarinet just has the three registers. The 'chalumeau' register, named after the early reed instrument it derived from; the 'clarion' register, named because people thought it sounded like a sort of small trumpet; and the 'altissimo' register, named because it's very high!

The written ranges, for the usual Bb clarinet, are:

chalumeau: E below middle C up to the Bb above middle C.
clarion: B above middle C to the second C above that.
altissimo: anything above that as far as you can get it to go!

I think that's right. If not I'm sure Barry-Clari will be along to correct it!