Connecting to External MIDI Gear (TRS-DIN)

While your Yaeltex controller is a powerhouse for controlling software, its capabilities extend far beyond the computer. By using its built-in MIDI ports, you can directly control hardware synthesizers, drum machines, effects pedals, and any other gear that speaks the language of MIDI.

This guide will explain how to use the MIDI ports on your controller to create a computer-free or hybrid hardware setup.

Understanding the Ports: TRS vs. 5-Pin DIN

Your Yaeltex controller uses a modern, space-saving standard for its MIDI ports, while most older and contemporary hardware uses a larger, classic connector.

• On Your Yaeltex Controller: You will find MIDI TRS ports. These look like small headphone jacks (3.5mm) and are labeled IN, OUT, and THRU.
• On Most External Gear: You will find classic 5-pin DIN ports. These are larger, circular connectors.

To connect these two different types of ports, you will need a simple and inexpensive TRS to 5-pin DIN MIDI Adapter.

(A visual representation of the required adapter)

Crucial Note on Adapter Types:
There are two standards for these adapters, "Type A" and "Type B." The vast majority of modern gear, including Yaeltex controllers, uses Type A. When purchasing an adapter, ensure it is a Type A adapter for guaranteed compatibility.

The MIDI Signal Flow: IN, OUT, and THRU Explained

Understanding what each port does is key to connecting your gear correctly.

MIDI OUT

This port sends messages from your Yaeltex controller to your other gear. It "tells" the other device what to do.

• Use Case: You want to play notes on a hardware synthesizer using the buttons on your Yaeltex controller.
• Connection: Yaeltex MIDI OUT -> Synth MIDI IN

MIDI IN

This port receives messages from another device to your Yaeltex controller. It "listens" for commands.

• Use Case: You have a hardware sequencer sending out a pattern, and you want the LEDs on your Yaeltex controller to light up in time with that sequence.
• Connection: Sequencer MIDI OUT -> Yaeltex MIDI IN

MIDI THRU

This port takes an exact copy of whatever signal is coming into the MIDI IN port and passes it along to the next device in a chain. It's for "daisy-chaining" multiple pieces of gear.

• Use Case: You want to control two synthesizers from the same sequencer.
• Connection: Sequencer MIDI OUT -> Synth 1 MIDI IN, then Synth 1 MIDI THRU -> Synth 2 MIDI IN.

Practical Connection Scenarios

Scenario 1: Controlling a Hardware Synthesizer

You want to use your Yaeltex controller to play and tweak a hardware synth.

1. Connect a TRS to 5-pin DIN MIDI Adapter to the MIDI OUT port of your Yaeltex controller.
2. Connect the 5-pin DIN end of the adapter to the MIDI IN port of your synthesizer.
3. In Kilowhat, program your buttons and knobs to send the desired MIDI notes and CC messages. Your controller is now playing your synth!

Scenario 2: Creating a Visual Sequencer Display

You want the LEDs on your Yaeltex button grid to light up in sync with an external hardware sequencer.

1. Connect a TRS to 5-pin DIN MIDI Adapter to the MIDI IN port of your Yaeltex controller.
2. Connect the 5-pin DIN end of the adapter to the MIDI OUT port of your hardware sequencer.
3. In Kilowhat, configure the LED feedback for your buttons to respond to the incoming MIDI notes from the sequencer. Now, as the sequencer plays, your controller will light up!

By using the MIDI TRS ports, you can transform your Yaeltex controller into the true command center of your entire hardware and software studio, giving you hands-on control over every instrument in your creative arsenal.

Updated on: 26/06/2025