--- title: "OXI Coral Guide EP.4: MIDI Channel Configuration | Takazudo Modular" url: "https://takazudomodular.com/en/guides/oxi-coral-guide-ep4/" language: en description: "EP.4 of the OXI Coral guide series. Starting from the default polyphonic setup, we cover changing the MIDI channel for all voices at once, and splitting parts by assigning different MIDI channels to individual voices." alternate_ja: "https://takazudomodular.com/guides/oxi-coral-guide-ep4/" date_published: "2026-04-13" date_modified: "2026-04-13" source: "Takazudo Modular" --- ![OXI Coral Guide EP.4: MIDI Channel Configuration](https://imgs.takazudomodular.com/images/p/coral-ep4-thumb/revisions/production/r1-362e45889d194c99eeb767dd59d57bc9113099d0c3e5d47dca07fffc7a44da1f/1200w.webp) # Guide: OXI Coral Guide EP.4: MIDI Channel Configuration Author: Takazudo | Published: 2026/04/13 | Updated: 2026/10/03 - [# Guide](https://takazudomodular.com/en/tags/guide/) - [# OXI Instruments](https://takazudomodular.com/en/tags/oxi/) - [# OXI Coral](https://takazudomodular.com/en/tags/oxi-coral/) - [# MIDI](https://takazudomodular.com/en/tags/midi/) - [# Modular Synthesizer](https://takazudomodular.com/en/tags/modular/) - [# Product Explanation](https://takazudomodular.com/en/tags/product-explanation/) [OXI Coral Guide](https://takazudomodular.com/en/guides/series/oxi-coral-guide/) EP.4／7 episodes [Previous episode: OXI Coral Guide EP.3: Exploring the Voice Engines](https://takazudomodular.com/en/guides/oxi-coral-guide-ep3/) [Next episode: OXI Coral Guide EP.5: Voice Setup and Multitimbrality](https://takazudomodular.com/en/guides/oxi-coral-guide-ep5/) This article follows an official video recorded before firmware 3.0. Its engine lineup, controls, and app screens describe the version shown in that video. Firmware 3.0, released September 30, 2026, offers 27 engines with up to 10 loaded, subject to Flash/RAM limits; polyphony depends on the engine. See the [current product details](https://takazudomodular.com/en/products/oxi-coral-intro/) and [v3 manual](https://manuals.takazudomodular.com/oxi-coral/?lang=en) for current behavior. Welcome to EP.4 of the OXI Coral guide series. This time, we'll cover how to configure MIDI channels. By default, Coral operates as a polyphonic sound source on MIDI channel 1, but you can also change the channel for all voices at once, or assign different channels per voice. By applying this, you can play multiple parts — bass, lead, chords, and more — simultaneously from a single module. Takazudo Modular publishes manuals and related documents with Japanese translations. See the links below. - [OXI Coral: ManualJapanese translation included](https://takazudomodular.com/manuals/oxi-coral/) [YouTube video](https://www.youtube.com/watch?v=CzdJqbfYgvw) ## Default MIDI Channel Configuration Right after powering on, all 8 of Coral's voices are assigned to MIDI channel 1. In this state, since every voice belongs to the same channel, Coral receives MIDI note data from channel 1 polyphonically. [Play video](https://youtu.be/CzdJqbfYgvw?t=0) All voices set to MIDI Ch 1 ## How to Change the MIDI Channel To change the MIDI channel for all voices at once, hold the **Color** button and turn the **Harm/MIDI** knob. While operating, the LED ring displays the currently selected MIDI channel in real time. Since the knob position carries over from its previous value, you may need to turn it a bit before the channel actually changes. [0:09~](https://youtu.be/CzdJqbfYgvw?t=9) The moment you release the **Color** button, the new MIDI channel is applied to all voices. Below is the LED ring display after changing to MIDI channel 2. LED ring after changing to MIDI Ch 2 ## Per-Voice MIDI Channel Configuration Each of Coral's 8 voices can have its own independent MIDI channel. Voices assigned to the same MIDI channel are automatically grouped into a single **part**. For example, if you assign voice 1 to channel 1 (bassline), voice 2 to channel 2 (lead), and voices 3–8 to channel 3 (chords or pads), Coral functions as a multitimbral sound source with three parts. ### Procedure Here's how to set the MIDI channel for each voice: 1. Hold the **Color** button (encoder) down and turn the encoder to select a voice. The selected voice is shown on the LED ring in a bluish color (blue) 2. While still holding the **Color** button, turn the **Harm/MIDI** knob to select the desired MIDI channel 3. Release the **Color** button, and the selected MIDI channel is assigned to that voice [0:45~](https://youtu.be/CzdJqbfYgvw?t=45) The example below shows the procedure for assigning voice 1 to MIDI channel 1. When voice 1 is selected, LED number 1 on the ring lights up blue. From there, turn the **Harm/MIDI** knob to display MIDI channel 1, then release the **Color** button, and voice 1 is assigned to MIDI channel 1. The remaining voices 2–8 stay on MIDI channel 2, giving you two parts. MIDI channel 1 assigned to voice 1 ## Practical Applications Using MIDI channel part splitting dramatically increases the flexibility of using Coral in combination with sequencers (OXI One, OXI Split, etc.). - **Bass + poly chords**: Split voice 1 as channel 1 (monophonic bass) and voices 2–8 as channel 2 (7-voice poly chords) - **Multi-timbral drums**: Assign each voice to a separate MIDI channel, so each channel of a drum sequencer triggers a different voice (engine) - **Layer switching**: Use Part CV to switch in real time which part is affected by the CV input Also, to reset all voices back to MIDI channel 1 and return to the default state, hold the encoder down for more than 5 seconds on the main view. When the LED ring displays a red animation, the reset is complete. That's it for EP.4. MIDI channel configuration is fundamental for using Coral as a multitimbral sound source. By switching between global changes and per-voice settings as needed, you can independently control multiple parts from a single Coral. ## OXI Coral Product Details You can find the product details for OXI Coral below. [OXI Coral 14HP multitimbral synth module. Firmware 3.0 offers 27 engines with up to 10 loaded in a custom build; eight voices can be grouped into parts, with polyphony limits depending on the engine. ![OXI Instruments: OXI Coral](https://imgs.takazudomodular.com/images/p/coral-0-front__og/revisions/production/r1-3b16f49ed7209dae58359d388b874df648262c5220bd777bbf11b94cf2c563b1/2000w.webp) 74,800 yen (tax & shipping included)](https://takazudomodular.com/en/products/oxi-coral-intro/) [OXI Coral: Black 14HP multitimbral synth module. Firmware 3.0 offers 27 engines with up to 10 loaded in a custom build; eight voices can be grouped into parts, with polyphony limits depending on the engine. Black edition. ![OXI Instruments: OXI Coral: Black](https://imgs.takazudomodular.com/images/p/coral-bk-0-front__og/revisions/production/r1-83b7e8416f7bc3a09f6237e600e1384a5f8bbcb0dcf2a408ce3b7350fc118f67/2000w.webp) 74,800 yen (tax & shipping included)](https://takazudomodular.com/en/products/oxi-coral-intro/) Series [← Previous ／ EP.3Exploring the Voice Engines](https://takazudomodular.com/en/guides/oxi-coral-guide-ep3/) [Next ／ EP.5 →Voice Setup and Multitimbrality](https://takazudomodular.com/en/guides/oxi-coral-guide-ep5/) ## [OXI Coral Guide](https://takazudomodular.com/en/guides/series/oxi-coral-guide/) 7 episodes 1. **Show EP.1 (1)** 1. [EP.1 Panel Controls and MIDI Basics 2026/04/13](https://takazudomodular.com/en/guides/oxi-coral-guide-ep1/) 2. [EP.2 CV Control Basics 2026/04/13](https://takazudomodular.com/en/guides/oxi-coral-guide-ep2/) 3. [EP.3 Exploring the Voice Engines 2026/04/13](https://takazudomodular.com/en/guides/oxi-coral-guide-ep3/) 4. EP.4 MIDI Channel Configuration Current 2026/04/13 5. [EP.5 Voice Setup and Multitimbrality 2026/04/13](https://takazudomodular.com/en/guides/oxi-coral-guide-ep5/) 6. [EP.6 Using the Configurator App 2026/05/16](https://takazudomodular.com/en/guides/oxi-coral-guide-ep6/) 7. **Show EP.7 (1)** 1. [EP.7 CV Patching with Meta 2026/07/13](https://takazudomodular.com/en/guides/oxi-coral-guide-ep7/)