Is There a FREEZE function on the SX600 or not..... ?
Yes, the SX600 has a Freeze function.
To call up the Freeze settings display press Direct Access button and then the Freeze button (which is next to the Memory button).
Make the desired settings and press Exit to close the Freeze display.
When the Freeze function is switched ON now (LED of the Freeze button lights up), the parameter groups you ticked before cannot be changed by Registrations, OTS or MIDI songs anymore.
Please refer also to page 77 of the SX600 Reference Manual.
Best regards,
Chris