With Ebor on this one. Don't mind accommodating horn players. Invite me 'round on Eb night ~ I rarely rely on a capo ~ [my late brother said that Bill Monroe considered A the "key of enlightenment" ~ might b apocryphal, knowing Craig]. AND, as has been pointed out, you might want to let the singer pick the key (where there's vocal bits). Anyway, …
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keep on pickin'
dennis