This question of "swing" or "inegalite" is something I've been thinking about for a long time. My friend Reg Hall - an ethnomusicologist who specializes in Irish traditional music, English traditional music, and New Orleans jazz - once told me that, when we talk about "traditional" music, playing "straight" or without "swing" is the performance practice that should have a special term because traditional musicians do it naturally - they swing because they play for dancing and this helps "lift" the dancers. So, when talking about traditional music, or what John Fahey used to call "primitive" or "untutored" music making, "syncopation" and "swing" are the rule rather than the exception. They don't need special terms - playing straight does.
Reg also told me a funny story - he was watching some "history of jazz" program on TV one evening and went into the kitchen to make some sandwiches during a break. The program started again while he was still in the kitchen. He listened and thought he recognized who was on trumpet, on trombone - he could identify pretty much the whole band. He rushed back out to the sitting room only to discover that there were no New Orleans musicians playing at all - it was a village band in Sicily playing for a funeral. He was surprised, but on thinking about it, it made perfect sense. These village musicians could read, but the notes were a guide rather than gospel, so they never played the same thing twice. Basically, they improvised around the melodic and harmonic content and made it work. They also had the natural swing common to almost western traditional music making. GDR To get on or off this list see list information at http://www.cs.dartmouth.edu/~wbc/lute-admin/index.html
