Excellent.
I used to make great tunes with this language (not only used on Qbasic, it is the most popular way to create music on 8bit/16bit computers in Japan during the 80s and early 90s). Most Sega Mastersystem and Genesis musics were composed by using this kind strings. They are commonly known as MML (Macro Music Language) and you can still find tons of emulators and tools to compose and listen to music written in this way.
More info here:
http://www.vgmpf.com/Wiki/index.php/Music_Macro_LanguageIt would be very nice to have not only the MML parser, but a whole sound engine for it written in Freepascal. Most common chips used for this kind of music were AY-3-8910, YM2203, YM2151, YM2608... What about emulating those chips? There already are tons of implementations in C or C++ so they could be easily translated to Pascal.