1. Introduction
The TC Electronic Quintessence Harmonizer is a compact, dual-voiced intelligent harmony pedal designed for guitarists. It features PolySense technology for accurate harmony tracking and an innovative MASH footswitch for expressive control. This manual provides detailed instructions to help you get the most out of your pedal.
Key Features:
- Exceptional dual-voiced intelligent harmony with PolySense.
- Groundbreaking MASH technology for pressure-responsive expression control via footswitch.
- MASH footswitch allows pitch-bending harmonized notes to the next interval.
- Selectable Latching and Momentary footswitch modes.
- Designed and engineered in Denmark.
2. Setup
Follow these steps to connect your Quintessence Harmonizer pedal:
- Power Connection: Connect a standard 9V DC power supply (not included) to the power input jack. Ensure the power supply provides at least 100mA and has a center-negative plug.
- Input Connection: Connect your guitar to the "STEREO IN MONO" jack using a standard 1/4-inch instrument cable. For mono operation, use this single input.
- Output Connection:
- For mono output, connect the "STEREO OUT MONO" jack to your amplifier or next pedal in the signal chain.
- For stereo output, connect both "STEREO OUT MONO" and the dedicated stereo output jack (if available, refer to pedal markings) to two separate amplifiers or stereo input devices.

Image: Top view of the TC Electronic Quintessence Harmonizer pedal, showing all knobs, switches, and input/output jacks.

Image: The Quintessence Harmonizer pedal placed on the floor, connected to a guitar and amplifier, ready for use.
3. Controls and Features
Understanding the controls is essential for utilizing the full potential of your Quintessence Harmonizer.

Image: A detailed view of the control knobs and switches on the Quintessence Harmonizer pedal.
3.1. Knobs
- KEY Knob: This knob selects the root note (key) for the harmony. Options typically range from C to B.
- SCALE Knob: This knob selects the musical scale or mode that the harmony will follow. Common options include Ionian (Major), Aeolian (Minor), Mixolydian, Dorian, Phrygian, Lydian, Locrian, and custom TonePrint scales.
- HARMONY Knob: This knob selects the interval(s) for the harmonized voice(s). It offers various intervals such as 3rd, 5th, 6th, and combinations, both above and below the played note.
- MIX Knob: Controls the blend between your dry (unaffected) guitar signal and the wet (harmonized) signal. Turn it fully counter-clockwise for dry signal only, and fully clockwise for wet signal only.
3.2. Switches
- # (Sharp) Switch: This toggle switch applies a sharp (#) to the selected key. When engaged, it shifts the root note up by a semitone. Ensure this is set correctly for the desired key.
- LATCH/MOMEN (Momentary) Switch: This toggle switch determines the behavior of the footswitch.
- LATCH: The effect turns on or off with each press of the footswitch.
- MOMEN: The effect is active only while the footswitch is held down. Releasing the footswitch bypasses the effect.

Image: A close-up view of the LATCH/MOMEN toggle switch, which controls the footswitch behavior.
3.3. MASH Footswitch
The MASH footswitch is a pressure-sensitive expression controller. Instead of a simple on/off switch, it responds to the amount of pressure you apply. This allows for dynamic control over various parameters, such as pitch bending the harmonized notes up to the next interval, or other effects assigned via TonePrint.

Image: A foot pressing down on the MASH footswitch, demonstrating its pressure-sensitive functionality.
3.4. True Bypass
The Quintessence Harmonizer features true bypass circuitry. This ensures that when the pedal is disengaged, your guitar signal passes through unaffected, preserving your original tone without any signal degradation.
3.5. TonePrint Technology
TonePrint allows you to customize the pedal's sound by loading custom presets created by TC Electronic and famous guitarists. You can also create your own unique harmony settings. TonePrints can be beamed wirelessly from your smartphone to the pedal's pickup or loaded via USB.

Image: A screenshot of the TonePrint application interface, showing options for customizing pedal settings.

Image: A smartphone held near a guitar pickup, demonstrating the wireless TonePrint beaming feature.
4. Operation
To achieve desired harmony effects, follow these operational guidelines:
- Select Key: Rotate the KEY knob to match the root note of the song or passage you are playing (e.g., C, G, A).
- Select Scale: Rotate the SCALE knob to match the musical scale or mode (e.g., Ionian for major, Aeolian for minor).
- Adjust Sharp Switch: If your key is sharp (e.g., C#), engage the # switch. For natural keys, ensure it is disengaged. Incorrect setting here can lead to dissonant harmonies.
- Choose Harmony Interval: Rotate the HARMONY knob to select the desired interval for the harmonized voice(s). Experiment with different settings to find the sound that complements your playing.
- Blend Dry/Wet Signal: Use the MIX knob to balance your original guitar signal with the harmonized signal. Start with a 50/50 blend and adjust to taste.
- Footswitch Mode: Set the LATCH/MOMEN switch to your preferred mode. Use LATCH for sustained effects and MOMEN for quick, expressive bursts of harmony.
- Utilize MASH: When the effect is active, press and hold the footswitch with varying pressure to engage the MASH functionality. This can bend the harmonized notes or control other parameters if a custom TonePrint is loaded.
- TonePrint Customization: For advanced customization, download the TC Electronic TonePrint app. Connect your pedal via USB or beam TonePrints wirelessly to explore and create unique harmony effects.
5. Maintenance
To ensure the longevity and optimal performance of your Quintessence Harmonizer:
- Cleaning: Use a soft, dry cloth to clean the pedal's exterior. Avoid abrasive cleaners or solvents.
- Storage: Store the pedal in a dry environment, away from extreme temperatures and direct sunlight.
- Power: Always use a compatible 9V DC, center-negative power supply. Disconnect power when not in use for extended periods.
- Connections: Periodically check all cable connections for wear and tear. Ensure jacks are free of dust and debris.
6. Troubleshooting
If you encounter issues with your Quintessence Harmonizer, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or weak signal. | Incorrect cable connections, power issue, pedal bypassed. |
|
| Harmonies sound dissonant or "atonal." | Incorrect KEY, SCALE, or # switch settings. |
|
| MASH footswitch not responding or behaving unexpectedly. | Incorrect LATCH/MOMEN setting, MASH functionality disabled in TonePrint. |
|
| Humming or unwanted noise. | Ground loop, faulty power supply, interference. |
|
7. Specifications
- Model: Quintessence Harmonizer
- Dimensions: 5 x 2.87 x 3.26 inches (approx.)
- Item Weight: 13.4 ounces (approx. 0.84 lbs)
- Power Source: Corded Electric (9V DC, center-negative, 100mA minimum)
- Hardware Interface: USB
- Signal Format: Analog
- Connector Type: USB
- Style: Compact
- Features: MASH Footswitch, PolySense, TonePrint Enabled, True Bypass
8. Warranty and Support
TC Electronic products are covered by a limited warranty. For detailed warranty information, product registration, and technical support, please visit the official TC Electronic website or contact their customer service. Keep your purchase receipt as proof of purchase for warranty claims.
For the latest software updates, TonePrint downloads, and additional resources, refer to the TC Electronic support pages online.





