That’s only SINGLE-blind ;-}
> On Sep 7, 2018, at 14:12, Chris Vandekerkhove <[log in to unmask]> wrote:
>
> To cut it short, what I did was playing the same chords over and over
> without my wife seeing what I was doing. I played with the soundhole open
> and closed using a small piece of wood which covered nicely the soundhole.
> Every time when the soundhole was open she described the sound as more
> open/brilliant. FYI: she couldn't see what I was doing so she had no clue
> whether the hole was open or closed.
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