I really don't even know what you're talking about because I haven't read anything about this and I have no dog in this race, but I wanted to share the following just as general advice for any of you who may be up to something:
If you were to end up in a situation where you have certain audio logs whose existence is documented, some of which are incriminating, what you would want to do is convert all the non-incriminating tapes to transcripts, prepare fake transcripts for the incriminating parts, then erase and overwrite (bleachbit, for example, if the format is digital) the incriminating parts while deleting all the rest normally, so that it looks like you just didn't save anything after taking the transcripts and some parts were unrecoverable by coincidence, rather than you having deleted only specific parts that then look more suspicious (paging Mr. Nixon). Voluntarily offer your records for attempted recovery, so that it doesn't look like you're hiding anything, and the non-incriminating originals will mostly be found; then the fact that your transcripts match the recoverable portions of the original audio serves to legitimise your fake transcripts for the unrecoverable parts.