I met one more problem. This is a piano project, in the experiment, when I press two keys at the same time, two sound files are slightly separated, not synchronized.
Then I built the following vi, I used one key to control two "Play sound files". I want to test if two files can be synchronized.
It turns out the first time when I press the key, two sound files are separated. However, if I press the key again before the playing ends, two files will be totally synchronized. Do you know how can i fix this problem?