Spotify bruker ikke mp3 heller.
Hvordan vet du at 320kbps er mest brukt for mp3 komprimering?
Spotify brukte noe som het Ogg/Vorbis for noen år siden. For alt det jeg vet bruker de det fortsatt. Høyeste kvalitet iht. Wikipedia er ca. 500 Kb/S
From Wikipedia, the free encyclopedia
Vorbis
libvorbis
Vorbis is a
free and open-source software project headed by the
Xiph.Org Foundation. The project produces an
audio coding format and software reference encoder/decoder (
codec) for
lossy audio compression. Vorbis is most commonly used in conjunction with the
Ogg container format[10] and it is therefore often referred to as
Ogg Vorbis.
Vorbis is a continuation of audio compression development started in 1993 by
Chris Montgomery.
[11][12] Intensive development began following a September 1998 letter from the
Fraunhofer Society announcing plans to charge licensing fees for the
MP3 audio format.
[13][14] The Vorbis project started as part of the Xiphophorus company's Ogg project (also known as OggSquish multimedia project).
[15][16] Chris Montgomery began work on the project and was assisted by a growing number of other developers. They continued refining the
source code until the Vorbis file format was frozen for 1.0 in May 2000.
[2][3][17] Originally licensed as
LGPL, in 2001 the Vorbis license was changed to the
BSD license to encourage adoption, with the endorsement of
Richard Stallman.
[18][19] A stable version (1.0) of the reference software was released on July 19, 2002.
[20][21][22]
Since February 2013,
[23] Xiph.Org has stated that the use of Vorbis should be deprecated in favor of the
Opus codec, which is also a Xiph.Org Foundation project and also free and open-source. Compared to Vorbis, Opus can simultaneously achieve higher compression efficiency—per both Xiph.Org itself and third-party listening tests
[24][25]—and lower encode/decode latency (in most cases, low enough for real-time applications such as
internet telephony or live singing, rarely possible with Vorbis).
[26]
Name
Vorbis is named after a
Discworld character Exquisitor Vorbis in
Small Gods by
Sir Terry Pratchett. The
Ogg format, however, is
not named after
Nanny Ogg, another Discworld character; the name is in fact derived from
ogging,
jargon that arose in the computer game
Netrek.
[12]
Usage
Vorbis faces competition from other audio formats, such as MP3. Though Vorbis is technically superior (addressing many of the limitations inherent to the MP3 design), MP3 has a far higher public profile.
[27] Because Vorbis does not have financial support from large organisations, support for the format is not as widespread, though programs such as
Audacity can convert to more popular formats,
[28] and support in games has gradually improved.
[29]
The Vorbis format has proven popular among supporters of
free software.
[30] They argue that its higher fidelity and completely free nature, unencumbered by patents, make it a well-suited replacement for patented and restricted formats.
3:45
Low-bitrate Vorbis example
Vorbis has different uses for consumer products. Many
video games store in-game audio as Vorbis, including
Amnesia: The Dark Descent,
Grand Theft Auto: San Andreas,
Halo: Combat Evolved,
Minecraft, and
World of Warcraft, among others.[
citation needed] Popular software players support Vorbis playback either natively or through an external
plugin. A number of websites, including
Wikipedia, use it.
[31][32][33][34] Others include
Jamendo and
Mindawn, as well as several national radio stations
[31] like JazzRadio,
Absolute Radio,
NPR,
Radio New Zealand[35] and
Deutschlandradio.
[36] The
Spotify audio streaming service has used Vorbis
[37][38] in a basket of codecs for its audio streams, but now has also been using AAC profiles.
[39] Also, the French music site Qobuz offers its customers the possibility to download their purchased songs in Vorbis format, as does the American music site
Bandcamp.
[40]
Technical details
Vorbis nominal bitrate at quality levels for 44.1 kHz stereo input. The new libvorbis v1.2 usually compresses better than these values (effective bitrate may vary).
Quality | Nominal bitrate | |
---|
| Official Xiph.Org Foundation Vorbis | |
---|
-q-1 | 45 kbit/s | 48 kbit/s |
-q0 | 64 kbit/s | |
-q1 | 80 kbit/s | |
-q2 | 96 kbit/s | |
-q3 | 112 kbit/s | |
-q4 | 128 kbit/s | |
-q5 | 160 kbit/s | |
-q6 | 192 kbit/s | |
-q7 | 224 kbit/s | |
-q8 | 256 kbit/s | |
-q9 | 320 kbit/s | |
-q10 | 500 kbit/s | |
Uansett, et langt sprang fra 16/44.1 sine 1411 kB/s
mVH