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Ronnie,

It is very simple to test if the clapping echoes defuse your sound too much. I usually use a method that I call “sailboating”. In fact I use the “sails” permanently installed in my listening room and it is the way how I control certain things that what I what to control…

So, sit in your listing chair and ask your friends to move a “sail” above your head in to the direction of direct line of sight with the first reflection from you speaker. You will instantaneously shell be able detecting if the defusing effect of clapping echoes is gone.  BTW, if it exists then it craps sound not only on the flutes or pianos but everywhere….

Now, the biggest question would be – what is the “sail”. A sail is a large peace of fabrics that might have different acoustic density – more thickness, mass and more hair on it the lower range it will be effective.  Do not forget - you do not what to crate a perm impediment for sound by sailing-out the reflections. You what to put a sort of acoustical low-pass filter for the first reflections. I used as past as gentle sails as very fine quality silk … it is still auditable.

Of course in each given case the location, size and the acoustic aggressiveness of the sails would be different. Here is how the Sailboating is implemented in my listening room.  My sails are approximately 1.5M by 3.5M and they are made from… actually I have no idea what they are made from. They are very fuzzy but very light and transparent… I call it “angry fabrics”….

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