At the KB we have a large collection of offline optical media. Most of these are CD-ROMs, but we also have a sizeable proportion of audio CDs. We’re currently in the process of designing a workflow for stabilising the contents of these materials using disk imaging. For audio CDs this involves ‘ripping’ the tracks to audio files. Since the workflow will be automated to a high degree, basic quality checks on the created audio files are needed. In particular, we want to be sure that the created audio files are complete, as it is possible that some hardware failure during the ripping process could result in truncated or otherwise incomplete files.
To get a better idea of what software tool(s) are best suitable for this task, I created a small dataset of audio files which I deliberately damaged. I subsequently ran each of these files through a set of candidate tools, and then looked which tools were able to detect the faulty files. The first half of this blog post focuses on the WAVE format; the second half covers the FLAC format (at the moment we haven’t decided on which format to use yet).