Use the afplay built-in command:

afplay file.mp3

Here are some more options from tldr.sh

afplay

  Command-line audio player.
  More information: https://ss64.com/osx/afplay.html.

  - Play a sound file (waits until playback ends):
    afplay path/to/file

  - Play a sound file at 2x speed (playback rate):
    afplay --rate 2 path/to/file

  - Play a sound file at half speed:
    afplay --rate 0.5 path/to/file

  - Play the first N seconds of a sound file:
    afplay --time seconds path/to/file

You can also make your Mac talk using the say command

say "test"

say -v Fred "Isn't it nice to have a computer that will talk to you?"

Lessons in this unit:

0:	Introduction
1:	How to use the macOS terminal
2:	Productivity gains of using a Mac and an iOS device
3:	A way to set up automations in macOS easily
4:	How to hide a file or folder in macOS Finder
5:	How to install a local SSL certificate in macOS
6:	Reverting a file to a previous version, on a Mac
7:	Take screenshots as JPG on macOS
8:	Convert an image or resize it using macOS Shortcuts
9:	Concatenating videos on macOS
10:	Fix files creation date in macOS
11:	Freeing space on a Mac
12:	How to add an “Open in Terminal” icon in macOS Finder
13:	How to add an “Open in VS Code” icon in macOS Finder
14:	How to find the bundle ID of a Mac app
15:	How to Fix the "Your CLT does not support macOS 11" error in macOS
16:	▶︎ How to play a sound from the macOS command line
17:	How to remove the shadow from window screenshots in macOS
18:	Removing all Homebrew stuff
19:	Run a Node.js script from your macOS menu bar