Binary messages on WebSockets

I've got the ws client implementation working, however my server sends binary messages over a websocket, (RAW PCM Audio frames) Is there any way to handle these in espruino, i'd like to so some visualisations of the data with neopixels eventually.

It seems that a binary message doesn't invoke the on message event. I put logging of on raw in and this is what I get:

>echo(0);
=undefined
Connected!
RAW: HTTP/1.1 101 Switching Protocols
U
RAW: pgrade: websocket
Connection: Upgrade
Sec-WebSocket-Accept: BJcYBMUMFM4VKC/jom8iiI/n2Zo=
Connected to server
RAW: ‚~,RIFF$âWAVEfmt 

€>}dataâ
RAW: 
üÿøÿ÷ÿøÿøÿøÿøÿøÿøÿø
RAW: ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø
RAW: ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿø
RAW: ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿø
RAW: ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿø
RAW: ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ
RAW: øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿ
RAW: øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿ
RAW: øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿø
RAW: ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿø
RAW: ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿø
RAW: ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿ
RAW: øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø
RAW: ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ
RAW: øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­
RAW: øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ
RAW: øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø
RAW: ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿø­ÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ
RAW: øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ
RAW: øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ
RAW: øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿ
RAW: øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ­øÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿøÿ
>
Disconnected
Connected
>