I'm not sure what trill you could be referring to...?All I can see is the long ones (bar 25), and some short ones (bars 4, 15). I used to do them both with 1 2, but I've found I can get the trill at bar 15 cleaner with 1 3, and using 2 to hit the F# that follows.
Parallel Play - simultaneously playing 2 or more keys in one hand. For example: playing keys C and D together; or C, E, G together.Parallel Sets - 1 key plays at a time. For example: C, then D; or C, then E, then G.
But he is not referring to these, he is referring to the tactile and mechanical sense in piano playing.Chang is referring to neither of these definitions when he uses the terms "parallel play" and "parallel sets."
I'm reading his book right now, and i do not understand exactly what he means by parallel play. Does it mean to play two notes together and the next two, like in. c-d, d-e and so on?