Db isn’t the most common key, but it shows up from time to time in jazz repertoire. Rhythm Changes is not often played in this key, however, this is a great way to learn how to improvise in concert Db.
Db Rhythm Changes
If you want to ignite your jazz skills with 10 in-depth studies of jazz standards that will help you take your jazz harmony knowledge to the next level, join our LJS Inner Circle membership, where you'll get access to our "Jazz Standards Playbook" courses, monthly jazz standard studies, and all of our premium courses.
"The Jazz Standards Playbook Vol. 2"