If you mean counting triplets as in how to write them then you write them as you would any normal triplet. A quaver triplet would be a crotchet and a crotchet triplet would be a minim (although crotchet triplets aren't used much)
Musical instruments of different types playing the same note may often be identified by the timbre of their sounds. Timbre is tone color, or tone quality which distinguishes different types of sound production.
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Thank you kind stranger:)