SpyServer No Sound On Client

[kf6qiu]

Set up SpyServer on Linux. After running spy server, I connect from Mac with a spy server client (in this case GQRX). I can see the fm wave form in GQRX, and can change channels. I cannot, however, hear the audio. Must be setting (client or server) that is not correct. I've tried dabbling and googling, to no avail. Any suggestions? The image is from the client. This is the tutorial I followed -https://www.rtl-sdr.com/rtl-sdr-tutorial-setting-up-and-using-the-spyserver-remote-streaming-server-with-an-rtl-sdr/