Here is a very short clip on playing changüi on the piano. It is normally played on the Cuban tres, but here Emilio talks about adapting the piano for this style.
Transcript of Cuban Masters Series Piano - Changüi
The changüí is not shown in the examples included in the ensemble section, but elements of it were wisely added by the tres player, who incorporated the changüí rhythm by playing a contra-tumbao to the piano part.
The changüí as such has not been demonstrated, but the flavor, the feel of it, is present For instance: (plays the piano)
The changüí flavor can be obtained by playing specific rhythmic accents on either the piano's tumbao or the tres's contratumbao. In the ensemble, the piano was playing a son tumbao with some timba elements and, since the rhythms corresponded to each other, the tres answered with a changüí contra-tumbao.