Tremor is a fixed-point version of the

Vorbis 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, libvorbis. Vorbis is most comm ...

decoder for those platforms without

floating point In computing, floating-point arithmetic (FP) is arithmetic on subsets of real numbers formed by a ''significand'' (a signed sequence of a fixed number of digits in some base) multiplied by an integer power of that base. Numbers of this form ...

operations. It is by the

Xiph.Org Foundation The Xiph.Org Foundation is a nonprofit organization that produces free multimedia formats and software tools. It focuses on the Ogg family of formats, the most successful of which has been Vorbis, an open and freely licensed audio format and ...

. It is a software library that decodes the Vorbis audio format. Tremor uses fixed-point and movable-point arithmetic numeric representations in its implementation so that it can be used by small embedded devices, which typically do not have floating-point processors. Thus, Tremor enables small

embedded device An embedded system is a specialized computer system—a combination of a computer processor, computer memory, and input/output peripheral devices—that has a dedicated function within a larger mechanical or Electronics, electronic syst ...

s to play audio files stored in the Vorbis format. Tremor was originally developed by Xiph.Org as a part of a contract for the

Iomega Iomega Corporation (later LenovoEMC) was a company that produced external, portable, and networked data storage products. Established in the 1980s in Roy, Utah, United States, Iomega sold more than 410 million digital storage drives and disks, i ...

HipZip, but was since opened up to encourage wider use of the Vorbis format. Almost all hardware devices that can play Vorbis, and many software implementations on embedded devices (such as mobile phones) use Tremor or some descendant. It is

free software Free software, libre software, libreware sometimes known as freedom-respecting software is computer software distributed open-source license, under terms that allow users to run the software for any purpose as well as to study, change, distribut ...

released under the

New BSD license BSD licenses are a family of permissive free software licenses, imposing minimal restrictions on the use and distribution of covered software. This is in contrast to copyleft licenses, which have share-alike requirements. The original BSD licen ...

References

External links

Tremor
at the Xiph.Org Foundation wiki {{Xiph.org Audio codecs Xiph.Org projects