I suppose these are not unknown to the people who recorded and edited them. Works which show much promise and potential for us to use in the final piece. Did the artist wish to remain anonymous, did they simply forget to sign their creation because of time or were the artists air brushed out for political reasons! Ok I am being a bit silly with that but there are a range of reasons an artist will not sign their work. Perhaps they are a well know producer who wants to make sure their work is judged on merit not on their previous reputation.
I have quite a few of these so unless we were visited by a rather prolific of audio Banksy I suspect you forgot you put your name or group on them. Nevertheless you are part of the artistic process and are recognised in this post like a fallen soldier with no known grave. I will post as I edit them so if you wish to claim your lost property please do so.