No idea if this will be helpful but I wanted to satisfy my own curiosity.
Install Pico TTS using sudo apt install libttspico-utils then the following tiny flow will speak to you through your server's speakers assuming that at least ALSA is configured.
[{"id":"c360ce2a0183b10e","type":"inject","z":"4a3fcf357a20bf56","name":"Dave","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"Look Dave, I can see you're really upset about this.","payloadType":"str","x":210,"y":1280,"wires":[["6f48f521352afcc4"]]},{"id":"6f48f521352afcc4","type":"exec","z":"4a3fcf357a20bf56","command":"pico2wave -l en-GB -w lookdave.wav \"","addpay":"payload","append":"\" && aplay lookdave.wav && rm lookdave.wav","useSpawn":"false","timer":"","winHide":true,"oldrc":false,"name":"","x":450,"y":1280,"wires":[[],[],[]]}]
Similarly, as long as you have ALSA installed and configured, you should be able to play various sound file formats with aplayer:
[{"id":"347583e6184bc379","type":"inject","z":"4a3fcf357a20bf56","name":"Left","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"/usr/share/sounds/alsa/Side_Left.wav","payloadType":"str","x":210,"y":1360,"wires":[["80ecb8a8c9bcb479"]]},{"id":"80ecb8a8c9bcb479","type":"exec","z":"4a3fcf357a20bf56","command":"aplay","addpay":"payload","append":"","useSpawn":"false","timer":"","winHide":true,"oldrc":false,"name":"","x":350,"y":1360,"wires":[[],[],[]]}]
Got some ideas on using this with a PIR detector in my office so that the server tells me if something is wrong when I walk in. Might get it to tell me the weather in the morning as well 
