@nhiennguyenhuy,
Don't know if you have seen this discussion. @tve has been so kind to create a very basic pcm player node in Flexdash for us yesterday evening.
Flexdash is a new dashboard for Node-RED with lot of potential. It is currently in alfa status, but it is already quite stable. You can run it in parallel to your old dashboard. So you can always give it a try if you have time. Constructive feedback is very welcome!!!
Did not have time yet to digg into the code of that player node, so perhaps it doesn't completely fits your use case....
