Securing audio transfer

In the context of A/V preservation work-flows, digital signal transfer integrity recently has been focussed on increasingly. While digital signal processing and - storage is essentially lossless, unwanted signal alteration may occur on the way from the A/D Converter to the file. As almost any digital capturing systems use packetizing, the signal may be affected by driver bugs leading to incorrect sample sequence, or the system may drop buffers intermittently, thus introducing artefacts. Other error sources are to be found by inadvertent signal processing, such as level changes or Sample Rate Conversion. Such processing nowadays is being used by many general purpose audio and video APIs that are to be found on all current computer operating systems, and as well in some interface devices. The paper presents an integrated method of securing the transfer of audio to the digital file, using error detection algorithms, in real time. Thus, the operator will be informed of any changes that have occurred during the transfer without any additional time - and equipment overhead.