Pertaining to the bassett horn, does any one have information on it? Is it still in use today? Thanks for your aid. Tell me all you have to know! Thanks...

This might be helpful. Found it on some website.
In the 20th century, Karlheinz Stockhausen has written for basset horn, giving it a prominent place in his cycle of operas Licht and other pieces.
* "Dreams and Prayers of Isaac the Blind" for solo clarinetist (soprano clarinets, basset horn, and bass clarinet) and string quartet by Osvaldo Golijov; later arranged for solo clarinetist and string orchestra.[4]
* Serenade on Carl Maria von Weber's Oberon for basset horn and two guitars, op. 28, written by Heinrich Neumann.
* Karl Stamitz wrote a concerto for Basset Horn and Orchestra. It has been recorded on the instrument by Sabine Meyer.

The Prague Trio of Basset-horns, based in the Czech Republic, has a repertoire of music (originally written for, or transcribed for, three basset horns) by composers including Mozart, Scott Joplin, and Paul Desmond.