I have just received an alert from the Diigo Teacher-Librarian Group about Vocaroo.
I did try Vocaroo afer posting this.
My recording is here.
To my great delight the sotware gives you the option of generating a QR Code.
There is an embed code too:
<br><a href=”http://vocaroo.com” style=”font-size:xx-small;” title=”Vocaroo Voice Recorder”>Record and upload voice >></a>
and a share panel (with Ogg option):