This is a streaming opus player that doesn't work. It requires nodejs 0.10 due to a issue in the ogg decoder (there's a PR waiting to be merged.)
Output from saving the opus stream to disk and running opusinfo on it is:
$ opusinfo test.opus
Processing file "test.opus"...
New logical stream (#1, serial: c3ebd6b6): type opus
Encoded with Lavf56.18.100
User comments section follows...
encoder=Lavc56.20.100 libopus
Opus stream 1:
Pre-skip: 156
Playback gain: 0 dB
Channels: 1
Original sample rate: 24000Hz
Packet duration: 20.0ms (max), 20.0ms (avg), 20.0ms (min)
Page duration: 1000.0ms (max), 693.3ms (avg), 80.0ms (min)
Total data length: 18741 bytes (overhead: 1.77%)
Playback length: 0m:02.069s
Average bitrate: 72.45 kb/s, w/o overhead: 71.17 kb/s
Logical stream 1 ended
The file, of course, plays perfectly fine in VLC.