A conlang from the early 1800's in which the syllables were do re mi fa so la and ti. Music could be spoken and text could be rendered as music.

• http://www.ptialaska.net/~srice/solresol/intro.htm
• http://www.langmaker.com/outpost/solresol.htm

mi'e jezrax

I skimmed the docs at the first link, and found it interesting. I was most impressed with the non-verbal abilities of the language. Does lojban have any non-spoken aspects? Or, differently, is there any LojbanSignLanguage? --Skorgu