CTR2-MIDI controller

Set up the CTR2-MIDI's knob, six buttons and key jack to run the station and send CW.

Updated 12 Nov 2026

On this page

The CTR2-MIDI, made by Lynovation (KU7Q), is a small desk controller with a rotary encoder knob, six programmable push buttons and a 3.5 mm jack for a paddle, straight key or footswitch. It connects over USB as a standard MIDI device, so it works straight from the browser with nothing to install.

Browsers

The controller uses the browser's MIDI support: Chrome, Edge or Firefox. Safari does not support MIDI, and the tab says MIDI devices are not supported in this browser.

Connect it

  1. Plug the CTR2-MIDI in.
  2. Open Tools → Integrations and choose CTR2-MIDI.
  3. Check Enable CTR2-MIDI. The browser asks for permission to use MIDI devices the first time; allow it.
  4. Under MIDI Device, choose CTR2-MIDI, marked (recommended). Click Refresh if the list is empty.
The CTR2-MIDI tab, with the knob and button actions
The CTR2-MIDI tab, with the knob and button actions

If the controller is unplugged later, the tab shows Device not found with a Try again button.

The knob

The knob has four modes: Home, and Mode 1 to Mode 3. Press the knob to go to the next mode; press and hold it for two seconds to jump back to Home. In Home mode the knob is a VFO; in the other modes it adjusts a level from 0 to 100%. Holding the knob down while turning gives each mode a second action.

KnobDefault action
Knob (Home)VFO, 10 Hz per step
Knob (Home, Pressed)Slice Volume
Knob (Mode 1)NR Level
Knob (Mode 1, Pressed)NB Level
Knob (Mode 2)Vox Level
Knob (Mode 3)CW WPM

The buttons

Each button has a short-press action and a long-press action.

ButtonShort pressLong press
1CW ModeToggle NR
2SSB ModeToggle NB
3FT8 ModeFT4 Mode
4Toggle PTTToggle Vox
5Band Down
6Band UpDisconnect from Station

Pick different actions under Buttons. The choices are the same as for the FlexControl: PTT and toggles, mode buttons, band up and down, and disconnect. Reset to Defaults restores the tables on this page.

The key jack

The 3.5 mm jack has two modes, Normal and Extended. To switch, put the knob in Home mode and hold it for two seconds; the green LED lights in Extended mode. Each mode's left and right inputs have their own action:

InputDefault action
Left PaddleKeyer Dit
Right PaddleKeyer Dah
Left Paddle (Extended)Straight Key
Right Paddle (Extended)PTT

With the defaults, a paddle in Normal mode drives the console's built-in iambic keyer, and in Extended mode the left input is a straight key and the right one is a footswitch for PTT. The keyer's speed, mode, weight and sidetone are set in the same tab; see HaliKey and MIDI keys for what each setting does.

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