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Harp Modifications
There are a number of things you can do to make your harmonica overblow better.
Most of these techniques are aimed at making the reed respond better to the player.

1. Gapping the reeds will affect the reed's response to pressure.
2. Arcing the reed will  change the reeds behaviour when bent.
3. wax or nailpolish is used to stop squeeking reeds
4. Embossing narrows the slot to minimize leakage.
5. Tip scooping changes the airflow around the reed.
6. Corner rounding allows a reed to be gapped low without it sticking.

It must be said that almost all modifications to the harmonica that are aimed at improving the responsiveness of the reed will have a very clear side effect; the reeds will sound more brightly thatn they did before. This effect is most noticable in reeds that are embossed and is even a reason for some players to not use these modifications because they do'nt like the sound it produces.
User Contributed Notes
 
29-04-2009 05:35
I consider myself as a strong player with a developed tone and musical background. My question is about the elusive A note found by drawing the 3rd hole on a C harmonica.
I know you can get a G blow in the 3, a G# on the draw, chromatically up to the A, next a Bb, and finally the B natural - all by drawing in the 3 whole. But really, that A draw on the 3 hole - gosh darn it - it sounds so choked no matter how well I play it; and I can play it. I want to know is there a modification I can do that allows greeter ease, clarity, tone, fullness in that 3 whole draw? Turns out that A note is really important. I just want it too sound the best it can be. Please help.
Thank you
Ken
Richmond Va
16-10-2008 18:14
A B harp is a Cb Harp--unless you are REALLY into orchestral interpretations/microtones.

Get a B harp and re-label it. Ta-da! Cb harp.

Few people plaw blues in F#. But if you play in a band that tunes down a half step, the "Cb" will play second position "Gb" rather nicely.
29-05-2008 21:32
Edward Connell wrote:...Have you ever played/created/sold a C flat Harp?.....
I would love to try one as it would accompany the G harp of my friend during music composure.

Am I missing something here? What does the G harp have to do with it? Do you have any idea what you're talking about anyway? :-)
29-05-2008 12:29
Yes it is possible to overblow a harp without modifications. Some will squeel and some will be difficult to controll, but that depends on the harp model. The special 20 and the GM should work pretty well.
29-05-2008 02:28
IS it possible to do OB without any modification on my harp?
I use both SP20s and GM from Hohner.
19-05-2007 13:24
I think I would just buy a B harp and live with the enharmonic mysteries. But if you don't want to do that then you can always retune a regular C harp. I have tuned a low D harp down to a low C. quite a bit of work but it can be done fairly easily. Get out your sanding paper and make yourself a Cb / B harp.

I think that B harps are always the ones that stay behind on the shelves in the musicstores. Nobody wants to play blues in F# so they sell very few of them I guess.
19-05-2007 08:17
Edward Connell
I have approached a number of musicians,harmonica suppliers and Blues harp suppliers with this question:
Have you ever played/created/sold a C flat Harp?

To this date may 19 2007 I have not found a C flat Harp.
I would love to try one as it would accompany the G harp of my friend during music composure.
I presently use a C sharp.
Do you have knowledge of getting/plaing a C Flat Harp?
09-01-2006 08:25
I found all the information on harp modification really useful.
Well done.
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