Opus Examples

Audio samples

These samples demonstrate the quality achievable with Opus. They are have been encoded with Opus and then decoded back to wav so that any browser can play them.

Bitrate scalability

The following example demonstrates what happens when gradually varying the bitrate from 8 kb/s to 64 kb/s. It's an extreme example, but it shows how Opus can change bandwidth and bitrate seamlessly without any glitch. In practical applications, bitrate changes are expected to occur much more slowly.

Bitrate	Mono Stereo	Audio bandwidth

Example of use in a web page

Opus works with the <audio> element just like vorbis.

For example, this code in a web page:

 <audio src="ehren-paper_lights-96.opus" controls>

displays an embedded player that can play an Opus file.

For now, this only works with Firefox 15 or later.

Live HTTP streams

These streams can be played in using Firefox (version 15 or higher), foobar2000, Gstreamer/Totem (in Linux), or using opusdec from the command-line.

Hypnotic torture clock Mono 12kbit/sec
A rhythmic electronic chant of the current time. Prolonged exposure to this Temporal Fugue is not recommended. The stream is synthesized in real-time using boodler and encoded using opusenc and streamed using oggfwd and icecast.
Endless drone Stereo 64kbit/sec
A simulation of an FM3 Buddha Machine, this stream produces an endless stream of peaceful droning. The stream is synthesized in real-time using boodler and encoded using opusenc and streamed using oggfwd and icecast.

Interactive Demos

KRAD Radio is an open source audio/video mixing and streaming platform currently in active development.

• Demo station — Opuscentauri
• Demo station — Opusprime

Requires browser Opus and WebSockets support (e.g. Firefox)
(The latency is high due to buffering in the browser's audio tag and doesn't represent Opus' low latency.)

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