‘On the Road Again’ was recorded by the American blues-rock group Canned Heat in 1967. 
The distinctive harmonica solo first played by Alan ‘Blind Owl’ Wilson utilizes a special tuning adjustment. Played on a harp in key A in cross/2nd position E, adjustments to draw reed 6 are made by raising the pitch of the reed a semi-tone from F#-G.  
I show it below in Cross key of G (for comparison with other tunings) and also in Wilson’’s Cross key of E.
Notes of the Blues Scale in G:  G — A#/Bb — C — C#/Db — D — F — G	(one octave)
I	Gmaj	yes, x2 (one with 7th) and partial, x1	
ii	Amin	no	
iii	Bmin	no	
IV	Cmaj	yes, x7
V	Dmaj	no	
vi	Emin	yes, but partial, x3
vii	F#dim	yes, but partial, x2
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Also:  Bbmaj (inv.), Fmin (partial)
In First Position Key of C 
(Second Position Key of G)

 
			
			
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