Audio file format Wikipedia. An audio file format is a file format for storing digital audio data on a computer system. The bit layout of the audio data excluding metadata is called the audio coding format and can be uncompressed, or compressed to reduce the file size, often using lossy compression. The data can be a raw bitstream in an audio coding format, but it is usually embedded in a container format or an audio data format with defined storage layer. Format typeseditIt is important to distinguish between the audio coding format, the container containing the raw audio data, and an audio codec. A codec performs the encoding and decoding of the raw audio data while this encoded data is usually stored in a container file. Although most audio file formats support only one type of audio coding data created with an audio coder, a multimedia container format as Matroska or AVI may support multiple types of audio and video data. Sample Wav File Speech' title='Sample Wav File Speech' />There are three major groups of audio file formats Uncompressed audio formats, such as WAV, AIFF, AU or raw header less PCM Formats with lossless compression, such as FLAC, Monkeys Audio filename extension. Wav. Pack filename extension. TTA, ATRAC Advanced Lossless, ALAC filename extension. MPEG 4 SLS, MPEG 4 ALS, MPEG 4 DST, Windows Media Audio Lossless WMA Lossless, and Shorten SHN. Formats with lossy compression, such as Opus, MP3, Vorbis, Musepack, AAC, ATRAC and Windows Media Audio Lossy WMA lossy. Uncompressed audio formateditOne major uncompressed audio format, LPCM, is the same variety of PCM as used in Compact Disc Digital Audio and is the format most commonly accepted by low level audio APIs and DA converter hardware. Spesoft-Text-To-MP3-Speaker.jpg' alt='Sample Wav File Speech' title='Sample Wav File Speech' />Although LPCM can be stored on a computer as a raw audio format, it is usually stored in a. Windows or in a. OS. The AIFF format is based on the Interchange File Format IFF, and the WAV format is based on the similar Resource Interchange File Format RIFF. WAV and AIFF are designed to store a wide variety of audio formats, lossless and lossy they just add a small, metadata containing header before the audio data to declare the format of the audio data, such as LPCM with a particular sample rate, bit depth, endianness and number of channels. Since WAV and AIFF are widely supported and can store LPCM, they are suitable file formats for storing and archiving an original recording. Sample Wav File Speech' title='Sample Wav File Speech' />BWF Broadcast Wave Format is a standard audio format created by the European Broadcasting Union as a successor to WAV. Among other enhancements, BWF allows more robust metadata to be stored in the file. See European Broadcasting Union Specification of the Broadcast Wave Format EBU Technical document 3. July 1. 99. 7. This is the primary recording format used in many professional audio workstations in the television and film industry. BWF files include a standardized timestamp reference which allows for easy synchronization with a separate picture element. Stand alone, file based, multi track recorders from AETA,1 Sound Devices,2 Zaxcom,3 HHB Communications Ltd,4Fostex, Nagra, Aaton,5 and TASCAM all use BWF as their preferred format. Lossless compressed audio formateditA lossless compressed format stores data in less space without losing any information. The original, uncompressed data can be recreated from the compressed version. Uncompressed audio formats encode both sound and silence with the same number of bits per unit of time. Encoding an uncompressed minute of absolute silence produces a file of the same size as encoding an uncompressed minute of music. In a lossless compressed format, however, the music would occupy a smaller file than an uncompressed format and the silence would take up almost no space at all. Lossless compression formats include the common6FLAC, Wav. Pack, Monkeys Audio, ALAC Apple Lossless. Positions Sample Value Description 1 4 RIFF Marks the file as a riff file. Characters are each 1 byte long. File size integer Size of the. They provide a compression ratio of about 2 1 i. PCM. Development in lossless compression formats aims to reduce processing time while maintaining a good compression ratio. Lossy compressed audio formateditLossy compression enables even greater reductions in file size by removing some of the audio information and simplifying the data. This of course results in a reduction in audio quality, but a variety of techniques are used, mainly by exploiting psychoacoustics, to remove the parts of the sound that have the least effect on perceived quality, and to minimize the amount of audible noise added during the process. The popular MP3 format is probably the best known example, but the AAC format found on the i. Schaudt Ebl 100 Manual'>Schaudt Ebl 100 Manual. Utilities freeware by Dimio, DShutdown, DSynchronize, HDHacker, DTaskManager and DSpeech. Tunes Music Store is also common. Most formats offer a range of degrees of compression, generally measured in bit rate. The lower the rate, the smaller the file and the more significant the quality loss. List of formatseditFile Extension. Creation Company. Description. 3gp. Multimedia container format can contain proprietary formats as AMR, AMR WB or AMR WB, but also some open formats. Audible. com Amazon. A low bitrate audiobook container format with DRM, containing audio encoded as either MP3 or the ACELP speech codec. The Advanced Audio Coding format is based on the MPEG 2 and MPEG 4 standards. AAC files are usually ADTS or ADIF containers. Audible. com Amazon. An Audiobook format, which is a variable bitrate allowing high quality M4. B file encrypted with DRM. MPB contains AAC or ALAC encoded audio in an MPEG 4 container. More details below. ACT is a lossy ADPCM 8 kbits compressed audio format recorded by most Chinese MP3 and MP4 players with a recording function, and voice recorders. Apple. A standard audio file format used by Apple. It could be considered the Apple equivalent of wav. AMR NB audio, used primarily for speech. Matthew T. Ashland. Monkeys Audio lossless audio compression format. Sun Microsystems. The standard audio file format used by Sun, Unix and Java. The audio in au files can be PCM or compressed with the law, a law or G7. AMR WB audio, used primarily for speech, same as the ITU Ts G. NCH Software. A variable codec format designed for dictation. It has dictation header information and can be encrypted as may be required by medical confidentiality laws. What Are Some Games Like Slasher. A proprietary format of NCH Software. Olympus. DSS files are an Olympus proprietary format. It is a fairly old and poor codec. GSM or MP3 are generally preferred where the recorder allows. It allows additional data to be held in the file header. Sony. A Sony proprietary format for compressed voice files commonly used by Sony dictation recorders. A file format for the Free Lossless Audio Codec, a lossless compression codec. Designed for telephony use in Europe, gsm is a very practical format for telephone quality voice. It makes a good compromise between file size and quality. Note that wav files can also be encoded with the gsm codec. Klax. An i. Klax Media proprietary format, the i. Klax format is a multi track digital audio format allowing various actions on musical data, for instance on mixing and volumes arrangements. D Solar UK Ltd. A proprietary version with Digital Rights Management developed by 3. D Solar UK Ltd for use in music downloaded from their Tronme Music Store and interactive music and video player. An audio only MPEG 4 file, used by Apple for unprotected music downloaded from their i. Tunes Music Store. The Happiness Code Ebook here. Audio within the m. AAC, although lossless ALAC may also be used. An Audiobook podcast extension with AAC or ALAC encoded audio in an MPEG 4 container. Both M4. A and M4.