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All data values are stored in big-endian (most significant byte first) format.

Sum of data offset and data size gives audio file full length. snd (hex: 2E 73 6E 64) at the beginning of the audio file.ĪU file have a header that consists of six unsigned 32-bit words, which define: signature, data offset, data size, encoding, sample rate and number of channels. Newer files have a header, an optional information chunk and then the data (in big endian format).ĪU Audio files must have a signature (tag). Originally it was headerless, being simply 8-bit µ-law-encoded data at an 8000 Hz sample rate. The format was common on on early Web pages. The AU file format is a simple audio file format, being developed by Sun Microsystems. Once this connection has been established and tested, E2B R2 files can be electronically submitted system to system using the AS2 transmission protocol.įor further information, refer to the Electronic submission of individual case safety reports - Electronic data interchange for ICSR submission using the E2B R2 format.AU Audio Signature Format: Specification & AU Recovery Example This will require the exchange of technical and contact details as well as applicable digital certificates. Prior to submission of an E2B R2 file, a connection will need to be setup between your system and TGAs system. The ICH ICSR DTD document defines the specific data elements to be included for electronic submission of adverse event data, the order of the elements, and their interrelationship.