A thought - we are constantly preparing our large collection of recordings for depositing in an official archive and have been strongly advised to do as little as possible to the original recordings in light of the fact that technology is constantly developing and what is not possible today may well be in say ten years time.
If your recordings are archivable, it is well worth bearing this in mind.
Charles Macfarlane
Thanks a million for your site address; I should think it will be a great help to our work
Jim Carroll