Opus
The clip as Opus — the modern low-latency codec used by WebRTC and streaming. Browser-playable; for testing Opus decoding and conversion.
Specifications
- Source
- 3 s A-major triad, 44.1 kHz stereo
- Codec
- Opus
- Bitrate
- 96 kbps
- Lossless
- false
What is a .opus file?
Opus is a highly efficient lossy audio codec standardized by the IETF, excelling across low-latency speech and high-quality music at a wide range of bitrates. Files typically use an Ogg container. It is the default audio codec for WebRTC and much modern streaming.
How to use this file
Use an example Opus file to test low-latency and music decoding, real-time communication pipelines, and converters that transcode between Opus and other codecs.
How to use this file for testing
“Opus” is a deterministic Novus Examples fixture for Conversion testing, Audio analysis. The same content exported across many formats and linked as a group, so you can convert one and diff against the expected twin.
Documented properties for this file: OPUS · 53,191 bytes. Compare results against paired or grouped companions on this page when present (clean↔damaged, searchable↔scanned, or format twins) so scores stay reproducible across runs.
Download the file once, keep the path stable in CI or local scripts, and treat the spec table as the contract: dimensions, seeds, field lists, and roles are intentional. Corrupt or invalid samples are labelled as such — expect parsers to fail loudly rather than silently accept them.
Media fixtures are short and synthetic by design. Prefer waveform or transcript ground truth in the same group when measuring ASR, trim, upscale, or sync tools; do not assume broadcast-quality masters.
Code examples
<audio controls preload="none" src="triad.opus"></audio>Related files
- wav1 kHz Tone @ 16000 Hz Sample Rate (WAV)A 1 kHz sine tone sampled at 16000 Hz — part of a sample-rate ladder (8/16/44.1/48/96 kHz) of the identical tone, for testing resampling, sample-rate detection, and aliasing.
- wav1 kHz Tone @ 44100 Hz Sample Rate (WAV)A 1 kHz sine tone sampled at 44100 Hz — part of a sample-rate ladder (8/16/44.1/48/96 kHz) of the identical tone, for testing resampling, sample-rate detection, and aliasing.
- wav1 kHz Tone @ 48000 Hz Sample Rate (WAV)A 1 kHz sine tone sampled at 48000 Hz — part of a sample-rate ladder (8/16/44.1/48/96 kHz) of the identical tone, for testing resampling, sample-rate detection, and aliasing.
- wav1 kHz Tone @ 8000 Hz Sample Rate (WAV)A 1 kHz sine tone sampled at 8000 Hz — part of a sample-rate ladder (8/16/44.1/48/96 kHz) of the identical tone, for testing resampling, sample-rate detection, and aliasing.
- wav1 kHz Tone @ 96000 Hz Sample Rate (WAV)A 1 kHz sine tone sampled at 96000 Hz — part of a sample-rate ladder (8/16/44.1/48/96 kHz) of the identical tone, for testing resampling, sample-rate detection, and aliasing.
- wav440 Hz Tone @ 16-bit (WAV)A 440 Hz sine tone stored as 16-bit PCM — part of a bit-depth ladder (8/16/24-bit) of the identical tone, for testing bit-depth conversion, dithering, and quantisation-noise handling.
Generated by generation/audio_codecs.py. Free for any use, no attribution required — license.