Roland E-4 Owner's Manual page 26

Using the Looper
Playing back recorded audio
1. Record once, and then stop recording.
2. Press the [â/ó] (play/record) button when playback or recording is stopped.
Playback starts when the next clock is inputted.
During playing back, the [â/ó] (play/record) button blinks green and "PLAY" is displayed.
How the looper's state changes with the synchronization type
The sync works differently depending on how the external device is connected.
See the information below for how sync works differently when you press the buttons.
Operation
Recording When released
Playback When released
Stop When released
Overdubbing When released
Clear When released
Undo When released
Redo When released
26
How the external device is connected
No connection
When released
Waiting for clock
Waiting for clock
Waiting for clock
When released
When released
When released
SYNC IN jack
Waiting for clock
Waiting for clock
Waiting for clock
Waiting for clock
When released
When released
When released
MIDI jack / USB MIDI