Electro-Harmonix 720 Stereo Looper Pedal User Manual

1. Introduction

The Electro-Harmonix 720 Stereo Looper Pedal is a compact and versatile tool designed for musicians to record, overdub, and manage audio loops. It offers 12 minutes of stereo recording time across 10 independent loops, along with features like undo/redo, reverse, and half-speed effects. This manual provides detailed instructions for setting up, operating, and maintaining your 720 Stereo Looper.

Image 1.1: Front view of the Electro-Harmonix 720 Stereo Looper Pedal, showcasing its controls and footswitches.

2. Package Contents

Please ensure all items are present in the package:

• Electro-Harmonix 720 Stereo Looper Pedal
• 9.6V DC Power Supply
• Instruction Manual (this document)

3. Setup

Follow these steps to connect your 720 Stereo Looper Pedal:

1. Power Connection: Connect the included 9.6V DC power supply to the 9V power jack on the pedal. The pedal can also operate on a 9V battery (not included).
2. Audio Input: Connect your instrument or other audio source to the MONO/L INPUT R jack(s) using standard 1/4-inch instrument cables. For mono operation, use the MONO/L INPUT jack. For stereo, use both MONO/L INPUT and R INPUT jacks.
3. Audio Output: Connect the MONO/L OUTPUT R jack(s) to your amplifier, mixer, or other audio destination. For mono output, use the MONO/L OUTPUT jack. For stereo, use both MONO/L OUTPUT and R OUTPUT jacks.

Image 3.1: The 720 Stereo Looper Pedal integrated into a pedalboard setup, showing input and output connections.

4. Operating Instructions

4.1 Basic Looping Functions

• Record: Press the LOOP footswitch once to begin recording. The REC LED will illuminate.
• Play: Press the LOOP footswitch again to stop recording and start playback of your loop. The PLAY LED will illuminate.
• Overdub: While a loop is playing, press the LOOP footswitch to enter overdub mode. The DUB LED will illuminate, allowing you to add new audio layers. Press LOOP again to exit overdub and continue playback.
• Stop: Press the STOP/FX footswitch once to stop the current loop playback or recording.
• Clear: With the loop stopped, press and hold the STOP/FX footswitch for approximately 2 seconds to clear the current loop. The digital display will show 'CL' briefly.

4.2 Loop Management

The 720 Looper can store up to 10 independent loops.

• Select Loop Slot: Turn the LOOP knob to select one of the 10 loop slots (0-9). The digital display shows the current slot number.
• Save Loop: After recording a loop, press and hold the PUSH: MODE knob for 2 seconds. The display will flash, indicating the loop is saved to the currently selected slot. The MEM LED will illuminate.
• Recall Loop: Select the desired loop slot using the LOOP knob. If a loop is saved in that slot, the MEM LED will illuminate. Press the LOOP footswitch to play the recalled loop.
• Delete Saved Loop: Select the loop slot you wish to delete. Press and hold the PUSH: MODE knob for 2 seconds, then immediately press and hold the STOP/FX footswitch for 2 seconds. The display will show 'dL' (delete loop) and then 'CL' (clear) to confirm deletion.

4.3 Effects

• Reverse: While a loop is playing, press the REVERSE button to play the loop in reverse. The REVERSE LED will illuminate. Press again to return to normal playback.
• Half Speed: While a loop is playing, press the 1/2 SPEED button to play the loop at half its original speed. The 1/2 SPEED LED will illuminate. Press again to return to normal playback.
• Undo/Redo: While a loop is playing or stopped, press and hold the LOOP footswitch for 2 seconds to undo the last overdub. The DUB LED will flash. Press and hold the LOOP footswitch again for 2 seconds to redo the undone overdub.

4.4 Controls and Indicators

• LEVEL Knob: Adjusts the output volume of the loop.
• LOOP Knob: Selects the loop slot (0-9) and adjusts the fade-out time (0-90%) when pushed.
• PUSH: MODE Knob: Push to cycle through modes (e.g., fade-out time adjustment). Press and hold to save/delete loops.
• REC/DUB/PLAY/MEM LEDs: Indicate the current operational status (Recording, Overdubbing, Playing, Memory saved).
• Digital Display: Shows the current loop slot number, fade-out percentage, and status messages.
• REVERSE/1/2 SPEED Buttons: Activate/deactivate respective effects.
• LOOP Footswitch: Controls record, play, overdub, and undo/redo functions.
• STOP/FX Footswitch: Stops playback/recording, clears loops, and activates effects (when in FX mode).

5. Features

• 10 independent loops for versatile performance and practice.
• Undo-Redo, Reverse, and ½ Speed Effects accessible via dedicated controls.
• High-quality, uncompressed audio with 24-bit A/D/A converters and a 44.1kHz sample rate.
• Stereo input and output for enhanced usability, allowing two instruments to be recorded simultaneously.
• Silent footswitches ensure smooth and quiet operation during live use or recording.

6. Specifications

Image 6.1: Diagram illustrating the physical dimensions of the 720 Stereo Looper Pedal.

7. Troubleshooting

If you encounter issues with your 720 Stereo Looper, refer to the following common solutions:

• No Power: Ensure the 9.6V DC power supply is correctly connected and functioning, or check the 9V battery if using battery power.
• No Sound: Verify all audio cables are securely connected to the correct input and output jacks. Check the LEVEL knob setting. Ensure your instrument and amplifier are working correctly.
• Loop Not Recording/Playing: Confirm you are following the correct sequence for recording and playback as outlined in Section 4.1. Check the digital display for error messages or unexpected indicators.
• Unwanted Noise: Ensure all connections are tight and shielded cables are used. Try isolating the pedal from other electronic devices that might cause interference.

8. Maintenance

To ensure the longevity and optimal performance of your 720 Stereo Looper Pedal:

• Keep the pedal clean and free from dust and debris. Use a soft, dry cloth for cleaning.
• Avoid exposing the pedal to extreme temperatures, humidity, or direct sunlight.
• Do not attempt to open the enclosure or modify the internal circuitry, as this will void the warranty.
• When not in use for extended periods, disconnect the power supply or remove the battery.

9. Warranty and Support

For warranty information, technical support, or service inquiries, please refer to the official Electro-Harmonix website or contact their customer service directly. Keep your purchase receipt as proof of purchase for warranty claims.