What is cjam blues?

Cjam blues is a popular 12-bar blues song originally composed by Jazz pianist Duke Ellington in 1942. It is a simple and classic blues tune that is often played as a jam session tune or as a blues standard in various jazz genres. The song features a catchy melody and a driving rhythm based on the traditional blues progression. It is commonly played in the key of C major and features an easy-to-follow chord progression that can be easily improvised upon. As a result of its popularity, many jazz artists have recorded their own versions of Cjam blues over the years, making it a classic and beloved blues standard for generations of musicians and fans alike.