[Harp-L] Key of "AB"??

David Fairweather dmf273@xxxxx
Tue Mar 21 11:53:17 EDT 2017

In perusing the online inventory of some major music retailers (Guitar
Center,  Musician's Friend), they often show harmonicas in the key of "AB".
   I know they don't mean "B" because they show those separately.   They
also have separate listings for natural minor and  country tuning.  So what
the heck do they mean by "AB"?

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