M-VAVE Yuimer MK-20 Multi-Effects Pedal User Manual

1. Introduction

Thank you for choosing the M-VAVE Yuimer MK-20 Multi-Effects Pedal. This all-in-one guitar/bass pedal board unit is designed to provide a wide range of effects, amp modeling, and utility features such as a looper, drum machine, and tuner. Featuring advanced Audio Neural Network (ANN) modeling technology, the MK-20 aims to deliver an extraordinary listening experience by accurately reproducing sound characteristics. This manual will guide you through the setup, operation, and maintenance of your MK-20 pedal.

2. Safety Information

• Do not expose the unit to rain or moisture to avoid fire or shock hazards.
• Do not open the casing. There are no user-serviceable parts inside. Refer all servicing to qualified personnel.
• Use only the specified power adapter (USB 5V 2A) to prevent damage.
• Avoid placing the unit near heat sources or in direct sunlight.
• Keep the unit away from strong electromagnetic fields.
• Clean only with a dry cloth.

3. Package Contents

Please check that all items are included in your package:

• M-VAVE Yuimer MK-20 Multi-Effects Pedal
• USB Cable (x1)
• User Manual (this document)

4. Product Overview

4.1. Top Panel Controls

1. PARA Knob: Rotate to navigate and select options. Press to select presets, confirm items, move modules, or edit parameters.
2. 2.4" Chromatic LCD Screen: Displays status and detailed information.
3. Parameter Dials (Knob1, Knob2, Knob3): Three dials for adjusting parameters in the Follow Screen function.
4. Expression Pedal: Functions as volume, wah, or other parameter control.
5. HOME Illuminated Button: Click to display the Home Screen. Click again to toggle BT music mode ON/OFF. Light indicates BT status (on: not activated, off: connected, steady: successfully connected).
6. 9 Effects Modules Illuminated Buttons: Show on/off state of the 9 effects modules. Light on means effect is active, off means effect is off. All 9 off means bypass mode.
7. DRUM Illuminated Button: Click to play/stop drum machine. Hold to enter DRUM menu. Light is constantly on when playing.
8. FX Illuminated Buttons: Short press to enter Stomp Switch Mapping interface. Long press to activate/deactivate FX module. Press to select module. Long press to activate VOL Module and toggle its ON/OFF.

4.2. Footswitches

The three footswitches (A, B, C) have customizable functions, especially under the Home Screen. Factory default functions are:

• Footswitch A: Single-click for Preset -1, Long-press for Preset -3.
• Footswitch B: Single-click for Preset +1, Long-press for Preset +3.
• Footswitch C: Single-click for Tap Function, Long-press to enter 'PRESET LIST' mode.

Combination Footswitch Functions:

• A + B (simultaneously): Enters Stomp Mode.
• A + C (long-press): Enters Tuner interface.
• B + C (long-press): Accesses LOOPER interface.

4.3. Back Panel Connections

1. INPUT: 1/4" mono audio input jack for guitar or other pedals.
2. MIDI: 1/8" TRS MIDI Interface for external MIDI control devices.
3. PHONES: 1/8" stereo earphone output jack.
4. OUTPUT: 1/4" stereo audio output jacks (L/R unbalanced TS) for audio equipment.
5. USB Jack (Type-C): Used for charging, as a computer sound card, data transmission, USB MIDI, firmware updates, factory settings, and loading third-party IRs/DS/AMP files. Supports OTG recording.
6. Charging Indicator: Red when charging, green when fully charged.
7. Power Switch: Toggles the unit on/off.

5. Setup

5.1. Initial Power On and Charging

Connect the MK-20 to a USB 5V 2A power source using the provided USB Type-C cable. The charging indicator will be red while charging and turn green when fully charged. The unit has a 3000mAh battery providing 8+ hours of battery life with a 4-hour charging time.

5.2. Pedal Calibration

Upon first startup, it is crucial to calibrate the expression pedal for correct functionality. If an 'X' is displayed after calibration, restart the process.

1. Press the SET button twice to enter the interface. Use the PARA knob to select GLOB and access the GLOB interface.
2. Under the GLOB interface, use the PARA knob to select the Pedal Set option.
3. After entering the Pedal Set interface, press the PARA button to begin calibration.

4. Fully lift the Expression Pedal, then press the PARA button.
5. Fully press the Expression Pedal forward, then press the PARA button again.

A checkmark on the screen indicates successful calibration. An 'X' indicates failure, requiring recalibration.

6. Operation

6.1. Effects and Presets

The MK-20 features 320+ effect types and 150 preset tones (75 factory, 75 user-editable). It includes 10 movable effect modules and 120 AMP models. The DS module offers 40 overdrive/distortion/fuzz effects. High-quality CABs (1024/2048pts) are supported, with 65 electric guitar CABs, 25 bass CABs, and 10 acoustic guitar CABs. Third-party impulse response files can be loaded.

6.2. Looper Function

The MK-20 includes a built-in 20-second mono front-end looper phrase cycling module. To access the Looper interface, long-press Footswitches B and C simultaneously from the Home Screen. Within the Looper interface, a short press of Footswitch A activates the EDIT function for adjusting Looper Screen parameters.

6.3. Drum Machine

The unit features a built-in drum machine with 128 drum presets. Click the DRUM button to play or stop the drum machine. Hold the DRUM button to enter the DRUM menu. The DRUM button light will pulse when playing and turn off when stopped. Use the PARA knob to select rhythm types.

6.4. Tuner

To enter the Tuner interface, long-press Footswitches A and C simultaneously.

6.5. Customization and Ambient Lighting

The MK-20 allows customization of 7 items, saved independently with presets. The color of the footswitch lights and on-screen ambiance can be adjusted. In the HOME interface, customize the color of each preset stomp switch light using the Dial3 knob in the Save interface. Factory default presets are set to blue.

6.6. Software and App Connection

The MK-20 supports connection to PC/Mac via USB and mobile devices via Bluetooth. Free software is available for managing tones, importing/exporting presets, factory data reset, firmware upgrades, and loading third-party IRs. The mobile app allows wireless monitoring and parameter adjustment.

App Connection Tips: Ensure Bluetooth is enabled on both your mobile device and the MK-20. Open the app, click 'Current Device', and select 'MK-20' to connect.

6.7. OTG Recording Function

The MK-20 can function as an audio interface with a cellphone. Use an OTG converter (sold separately) and a standard USB cable to connect. This enables direct recording to mobile apps or live broadcasting, including capturing the drum machine's audio.

6.8. Sound Cloning / Tone Catch (ANN Technology)

The MK-20 utilizes Audio Neural Network (ANN) modeling technology to simulate the tone texture of real speaker cabinets, producing realistic bass dynamics, clean tones, tube amp overdrive, and electric guitar harmonics. The official ANN software allows you to model, learn, and replicate audio to generate AMX format files.

Process:

1. Connect a classic pedal to a sound card. The left channel captures the original sound, and the right channel captures the effect pedal's output. Generate audio using host recording software.
2. Use the official ANN software to model, learn, and replicate this audio, creating an AMX format file.

The M-VAVE community's cloud training function allows you to record a file with a sound card, and the training is completed on the cloud server, providing AMXDATA files for import into the MK-20. Computer training supports NAM and AMXDATA formats.

6.9. USB Audio Interface Functionality

The MK-20 offers USB audio functionality, making it easy for home studio recording or silent practice. Simply connect it to your computer via USB to use it as an audio interface for:

• Recording VLOGs
• Practicing musical pieces
• Recording demos
• Recording and composing in host software

7. Specifications

8. User Tips

• Experiment with Presets: The MK-20 comes with 75 factory presets. Spend time exploring them to understand the range of sounds available and how different effects are combined.
• Customize Footswitches: Take advantage of the customizable footswitch functions to tailor the pedal's operation to your playing style and common needs. This can significantly improve live performance workflow.
• Utilize the App: The mobile app offers a convenient way to adjust parameters and manage presets wirelessly, especially useful during practice or performance where direct access to the pedal's small screen might be difficult.
• Explore the Community: The M-VAVE community platform allows you to download sounds shared by other artists. This is a great resource for new tones and inspiration.
• Regular Calibration: If you notice inconsistent behavior from the expression pedal, perform a recalibration as described in Section 5.2.

9. Troubleshooting

9.1. No Sound Output

• Ensure the unit is powered on and fully charged or connected to a power source.
• Check all cable connections (input, output, headphones) are secure and correctly plugged in.
• Verify that the volume levels on the MK-20 and connected equipment (amp, headphones) are turned up.
• Make sure no effects modules are in bypass mode or muted. If all 9 effect buttons are off, the MK-20 is in bypass mode.
• If using the Re-Amp function, ensure the instrument input is not blocked (see Section 6.10).

9.2. Expression Pedal Not Responding

• Perform the pedal calibration procedure as outlined in Section 5.2.
• Ensure the pedal is assigned to a function (e.g., volume, wah) and that the function is active.

9.3. App Connection Issues

• Confirm Bluetooth is enabled on both the MK-20 and your mobile device.
• Ensure the MK-20 is selected as the 'Current Device' in the app.
• Try restarting both the app and the MK-20.

9.4. Noise or Unwanted Sounds

• Check the CPU usage displayed on the screen. If it exceeds 99%, it may cause noise. Try reducing the number of active effects or complex presets.
• Ensure all cables are shielded and in good condition.
• Avoid placing the unit near other electronic devices that might cause interference.

10. Maintenance

• Cleaning: Use a soft, dry cloth to clean the unit. Do not use liquid cleaners or aerosols.
• Storage: When not in use for extended periods, store the MK-20 in a cool, dry place away from direct sunlight and extreme temperatures.
• Battery Care: For optimal battery life, avoid fully discharging the battery frequently. Charge the unit regularly, even if not in constant use.
• Firmware Updates: Periodically check the official M-VAVE website or app for firmware updates to ensure optimal performance and access to new features.

11. Warranty and Support

For warranty information, technical support, or service inquiries, please contact your retailer or the M-VAVE customer support directly. Keep your purchase receipt as proof of purchase for warranty claims.