Most articles written about performance practice deal with relatively small areas (trills overdotting etc.) placing emphasis on citing original sources or collating several original sources in order to support a given position. There is not sufficient information in these articles to deal with all aspects of Baroque style. This text was built on the premise that as many conclusions as possible should be drawn from the sources themselves. Leaps to conclusions about other aspects of style insufficiently documented in sources are made on the basis of the author's own experience as performer. There are different conclusions that one can reach as the area is large and some aspects of style find the various sources in disagreement (e.g. time signatures) or are simply not discussed. Most of the source disagreements stem from national differences in style…. used as main material for a course on the performance of the music of J.S. Bach or for a course on Baroque performance practice in general. From The Introduction.