What key is C for blues harmonica?
On a C tuned harp, second position would be in G. This is the most commonly used position for playing blues, rock and country. This position consists of mostly draw notes on the low end of the harmonica (holes 1 through 5) and it is important to master bending to play in this position.
Which harmonica key is best for blues?
It's best to get a harmonica tuned to the key of C if you're just starting out. You'll be able to play up to 3 octaves on a C major scale. Many of the songs you will learn are also tuned to the key of C. Most blues harmonicas are played in what's called a "second position" or also known as a "cross harp".