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technology/files/media/audio/Opus.md
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website: https://opus-codec.org/
obj: codec
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# Opus
Opus is a lossy audio coding format developed by the Xiph.Org Foundation and standardized by the Internet Engineering Task Force, designed to efficiently code speech and general audio in a single format, while remaining low-latency enough for real-time interactive communication and low-complexity enough for low-end embedded processors. Opus replaces both Vorbis and Speex for new applications, and several blind listening tests have ranked it higher-quality than any other standard audio format at any given bitrate until transparency is reached, including MP3, AAC, and HE-AAC.
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As an open format standardized through RFC 6716, a reference implementation called libopus is available under the New BSD License. The reference has both fixed-point and floating-point optimizations for low- and high-end devices, with SIMD optimizations on platforms that support them. All known software patents that cover Opus are licensed under royalty-free terms. Opus is widely used as the voice-over-IP (VoIP) codec in applications such as Discord, WhatsApp, and the PlayStation 4.
| Name | Value |
| --------- | ----------------------- |
| Extension | .opus |
| [MIME](../../MIME.md) | audio/ogg<br>audio/opus |
| Website | https://opus-codec.org/ |
| Name | Value |
| --------------------- | ----------------------- |
| Extension | .opus |
| [MIME](../../MIME.md) | audio/ogg<br>audio/opus |
| Website | https://opus-codec.org/ |

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technology/files/media/audio/WAV.md
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obj: codec
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# WAV
Waveform Audio File Format (WAVE, or WAV due to its filename extension; pronounced "wave") is an audio file format standard, developed by IBM and Microsoft, for storing an audio bitstream on PCs. It is the main format used on Microsoft Windows systems for uncompressed audio. The usual bitstream encoding is the linear pulse-code modulation (LPCM) format.
| Name | Value |
| --------- | -------------------------------------- |
| Extension | .wav<br>.wave |
| [MIME](../../MIME.md) | audio/x-wav<br>audio/wav<br>audio/wave |
| Name | Value |
| --------------------- | -------------------------------------- |
| Extension | .wav<br>.wave |
| [MIME](../../MIME.md) | audio/x-wav<br>audio/wav<br>audio/wave |