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You can undo or redo an overdub anytime you remain in the current 
memory where the overdub was recorded. You can also use a footswitch to 
clear all unstored loop phrase audio. 
Note: Changing loops discards any unstored overdubs. Storing the overdubs 
will also remove the ability to undo or clear overdubs.
Undo an Overdub
Press and hold the REC/PLAY/OVERDUB footswitch for two seconds to undo 
your last overdub. The REC/PLAY/OVERDUB and OVERDUB status LEDs flash 
yellow and the display briefly shows ud when the undo takes place. 
Redo an Overdub
Press and hold the REC/PLAY/OVERDUB footswitch to redo the last undone 
overdub; the REC/PLAY/OVERDUB and OVERDUB status LEDs flash yellow and the 
display briefly shows rd to indicate a redo has been performed. 
Clear Overdubs/Unstored Phrases
Press and hold the TEMPO/STOP footswitch for two seconds to clear the 
unstored recording/overdubs. The RECORD status LED will flash and the 
display will show CL to confirm the clearing. If the loop had been previously 
stored, the clear action will only clear unstored phrases and overdubs but 
leave the original loop that had been stored untouched.
Changing to a different loop also clears any unstored phrases and overdubs.
Undo, Redo, and Clear