discord.js/docs/general/faq.md

Frequently Asked Questions

These are just questions that get asked frequently, that usually have a common resolution. If you have issues not listed here, please ask in the official Discord server. Always make sure to read the documentation.

No matter what, I get SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode‽

Update to Node.js 6.0.0 or newer.

How do I get voice working?

• Install FFMPEG.
• Install either the node-opus package or the opusscript package. node-opus is greatly preferred, due to it having significantly better performance.

How do I install FFMPEG?

• npm: npm install --save ffmpeg-binaries
• Ubuntu 16.04: sudo apt install ffmpeg
• Ubuntu 14.04: sudo apt-get install libav-tools
• Windows: See the FFMPEG section of AoDude's guide.

How do I set up node-opus?

• Ubuntu: Simply run npm install node-opus, and it's done. Congrats!
• Windows: Run npm install --global --production windows-build-tools in an admin command prompt or PowerShell. Then, running npm install node-opus in your bot's directory should successfully build it. Woo!