Glass recently released headphones and a mono ear bud. This implies that it is capable of producing an audio signal from the Micro USB port.
Is it possible to create an adapter for Glass to connect to a standard audio connector, such as a 3.5mm headphone cable?
If you're handy with a soldering iron, it's pretty easy to make an adapter. Solder a 500k ohm resistor between pins 4 and 5 (ID and GND).
You'll need the following parts:
Once you have them, follow these instructions: