Hi Ted, After trying almost every combination, some of which worked better than others, what I do now in those kind of situations is just tune each piano to itself as best as possible. In reality, I don't think it is possible to match, completely, even two 9 foot grands of the same make, and I don't think it's possible to match a studio with a grand. Each piano is individual and will have its own unique qualities which do show up in its tuning. Just do a solid tuning, at the same pitch, on each one. They will sound just fine when played together. Let their differences enhance the performance. Best, Gina
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