When the SP-404 ships from the factory, Bank A is protected so no one accidentally erases the preset samples (the display will read "Prt" when attempting to sample).
To turn off protection:
1. Turn off the SP-404.
2. While holding [CANCEL], turn the SP-404 on. You may now sample to Bank A.
To turn off protection:
1. Turn off the SP-404.
2. While holding [CANCEL], turn the SP-404 on. You may now sample to Bank A.