Chicago tuning is a type of tuning traditionally used for 4 string plectrum banjos that is tuned the same as the top 4 strings of a guitar (D, G, B, E). This allows guitarists to use the same fingerings as they do on guitar. This tuning is traditionally used on plectrum banjos because the scale of the neck of plectrum banjos is very close to that of guitars so standard plectrum banjo strings can be used.
For sure, many guitarists are doing this with tenor banjos as well.
D chord is bad.
D harmonica (A blues):
G harmonica + C harmonica (without bending):
Backing Track: https://www.youtube.com/watch?v=rBj6cJx6Ecc
Practicing with bending, G harmonica
The Harmonica Play-Along Series will help you play your favorite songs quickly and easily. Just follow the notation, listen to the CD to hear how the harmonica should sound, and then play along using the separate backing tracks. The audio CD is playable on any CD player, and also enhanced so PC and Mac users can adjust the recording to any tempo without changing pitch! Volume 15 includes: All Blues • Au Privave • Comin’ Home Baby • Song for My Father • Sugar • Sunny • Take Five • Work Song.