Please accept my apology for this very late reply to your question of March 30th 2009.
You asked which harmonica would be best for your song with the chord progression, C /Am/F/G.
The first one that came to mind would be the Seydel Blues Session Zircular (Circular note placement system) in G (mixolydian).
Check out the Seydel website:
www.seydelusa.com
Here's the note chart for the Blues Session Circular in G (mixolydian). Don't let the "mixolydian" part confuse you. The harp is in C major, and you'll be playing in 2nd (cross) position.
Seydel lists the tunings of their harps by the hole #1 blow note. The hole 1 blow note on this harp is G.
On the chart below, the large letters are blow notes, the small letters are draw notes.
NOTE CHART, SEYDEL BLUES SESSION ZIRCULAR, Key of G (Starts on G):
||G a |B c |D e |F g |A b |C d |E f |G a |B c |D e ||
Best Regards
-- Edited by John Broecker on Saturday 20th of February 2010 02:56:25 PM
Oz, Hard to say without knowing the song. It may be that I couldn't help even then. A good place to start is to mimic part of the melody. Or the last few bars of the melody as an intro. Keep playing with it until something sounds right. You'll get it.
Oz, If the song is in F, an F harp will work if you play it in 1st position or what is known as "straight harp"
A very high percentage of the blues sound is played in second position also known as "Cross harp"
F will work for first position. For a second position, Blues harp sound try a Bb. You start with the key the song is in then count up 3 more keys (total of 4) to get the harp you would use for 2nd position.
Examples: If the song is in A. a,b,c,d D harp for 2nd position " C c,d,e,f F harp for 2nd position " G g,a,b,c C harp for 2nd position
Keep in mind, this is how you find the key of harp to use to play the intro your talking about IF you want to play it in second position/blues style. I hope some of this helps.