Tony,
When pressing the Registration, access to the vocalizer/voicetron and Mic were disabled as of 2.0 so as to avoid drastic vocal effect changes when you switched from a registration to another with a totally different vocal setting (unless you freeze the mic settings in the Registration Menu).
It will be re-enabled in 3.0 and you the user can now choose if mic and vocalizer should adopt the new vocal settings per the new registration or maintain current registration voice settings and ignor the new one ... your call!
Thanks,
AJ
[This message has been edited by Ketron_AJ (edited 08-06-2009).]