Asterisk ARI in stasis app

I have a problem. I am writing a stasis app. My app creates an external media channel in stasis via ARI. My app receive a voice stream. I am trying to send audio by using the mp3player command. But the command sends audio to my external media channel port. The caller cannot hear my sound. I want to send audio to my caller.

What do you mean when you state “mp3player command”?

Sorry, I wanted to say I use ARI command http://xxxxx.xxxxx/ari/channels/channel_id/play?media=voice.mp3&skipms=3000&api_key=api_key

That will play audio to the channel you’ve specified.

Thank you. it is so simply.