Suzuki OM-108 Omnichord User Manual

Introduction

The Suzuki OM-108 Omnichord is an electronic musical instrument designed for ease of use and portability. Originally released in 1981, the Omnichord features an automatic accompaniment function (auto bass/chord) and a unique harp sensor, known as the strumplate. Users can produce arpeggios corresponding to chords by pressing a chord button and sliding a finger across the strumplate. This design allows individuals without prior musical experience or knowledge of staff notation to easily create music. The OM-108 is a modern revival of this iconic instrument, retaining its distinctive electronic sounds and tactile playability.

Setup

Unpacking

Carefully remove the Omnichord OM-108 from its packaging. Ensure all components are present and undamaged. Retain the packaging for future storage or transport.

Powering On

The OM-108 can be powered by batteries or an optional AC adapter. For battery operation, insert 8 AA batteries into the battery compartment located on the underside of the unit. For AC power, connect a 12V (negative center) 1A universal/switching AC to DC adapter (not included) to the DC 12V 1A input port on the side of the unit. Press the Power button to turn the unit on.

Image: Side view of the Omnichord OM-108 showing the power input and audio/MIDI ports.

Connectivity

The Omnichord OM-108 offers various connectivity options:

• 1/4" Line Out (Mono): Connect to an external amplifier, mixer, or audio interface using a standard 6.35mm (1/4") jack cable for higher quality audio output.
• Phones: Connect headphones for private practice. This port also functions as a 1/8" line out with an appropriate adapter.
• MIDI Out: Connect to other MIDI-compatible devices or a computer (via a MIDI interface) to control external synthesizers or record MIDI data in a Digital Audio Workstation (DAW) such as Ableton Live.

Operation

Basic Controls Overview

The OM-108 features an intuitive layout with distinct sections for different functions:

Image: Overview of the Omnichord OM-108's control panel.

• Keyboard: Selects different instrument voices (e.g., guitar, piano, harp).
• Strumplate: The touch-sensitive surface used to play arpeggios and melodies.
• Rhythm: Controls for selecting rhythm patterns (e.g., disco, hip-hop, waltz) and adjusting tempo and volume.
• Chord: Buttons for selecting major, minor, and 7th chords, as well as 9th and 11th chords.
• Real Time Control: Switches for manual/auto strumplate mode, chord hold, and rhythm start/sync start.

Playing the Omnichord

To play the Omnichord:

1. Select a desired instrument voice from the Keyboard section.
2. Choose a rhythm pattern and adjust its tempo and volume.
3. Press a chord button (e.g., C Major, G Minor).
4. Slide your finger across the strumplate to play the corresponding arpeggio.

Image: A user's hand interacting with the Omnichord's controls.

The OM-108 is designed for real-time control, allowing for dynamic musical expression. It features a built-in speaker for immediate playback, and its compact size makes it suitable for playing anytime, anywhere.

Keyboard Overlay

The OM-108 includes a removable keyboard overlay that can be used to visualize traditional piano keys, aiding in understanding note relationships.

Image: Omnichord OM-108 with its keyboard overlay detached.

Maintenance

Cleaning

To clean the Omnichord, use a soft, dry cloth. For stubborn marks, a slightly damp cloth with mild soap can be used, followed by immediate drying. Avoid abrasive cleaners or solvents, as these can damage the finish and electronic components.

Storage

Store the Omnichord in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity. If storing for an extended period, remove the batteries to prevent leakage.

Troubleshooting

• Chord changes not registering: Ensure chord buttons are pressed firmly and the strumplate is clean. Check if the Real Time Control switch is set to the desired mode (Manual or Auto).
• Low audio output: Verify that the Master Volume and individual section volumes (e.g., Rhythm Volume, Main/Sub Strumplate Volume) are turned up. If using external speakers or headphones, check their connections and volume levels. Ensure the correct adapter is used if powering via AC, as an incorrect adapter (e.g., 500mA QChord adapter) may cause humming or low output.
• Incorrect diminished chord voicing: Some users have reported that diminished chords may not sound as expected (e.g., Cdim playing as Adim). This may be a characteristic of the instrument's voicing or a potential firmware issue. Refer to official Suzuki support for any available updates or clarifications.
• Unit does not power on: Check battery installation and charge level. If using an AC adapter, ensure it is the correct specification (12V 1A, negative center) and properly connected to a working power outlet.

Specifications

Warranty and Support

For information regarding warranty coverage, technical support, or service, please refer to the official SUZUKI website or contact the retailer from whom the product was purchased. Keep your proof of purchase for warranty claims.