When want to play voice files on Touch Event. I have a piano Keyboard
on Screen, when user Touch move on piano keys, play its' voice files.

Issue:

I used two way for trails

1. in Touch Move event, check x, y to avoid play twice in same Key
region. And when Touch move to a new key region, play the Key voice
once.

2. Use Handler Functions for the play action.

But when user move touch quickly, both ways cannot play every key
voice files in the process. sometime, only the first and last have
been played.

Do you any suggestions for that?

Thanks a lot

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