Question: what is the difference between c major 7 and c7?
Answer: Whenever you see a chord, the number 7 by itself always means a minor seventh. So, Cmaj7 means C major plus a major seventh and C7 means C major plus a minor seventh. ... So, Cmaj7 means C major plus a major seventh and C7 means C major plus a minor seventh. C by itself stands for C major.