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12 S
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The 12 Step2 can control a wide variety of MIDI software and hardware, but it can also be controlled by the USB
MIDI port.
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When in Standalone Mode, changing 12 Step2 presets via external software/hardware is possible using
Program Change messages. Program Changes sent over USB MIDI will select the corresponding preset in the
setlist — e.g. sending program change 23 will load the 23rd preset in the setlist.
Set which MIDI channel the 12 Step responds to with the "Program Change Preset Control" dropdown menu
in the Settings tab of the 12 Step Editor software.
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The 12 Step keys each have a red LED indicator that can be controlled by sending USB MIDI Control Changes
(CCs), numbers 20 through 33, to the 12 Step2. Any non-zero value (1-127) will turn the LED on, and a zero
value will turn it off. You can control all of the key LEDs simultaneously using CC42.
You can also control the brightness of the key backlight LEDs using CC 69, values 0-127 (this feature only
works with 12 Step2 hardware, older 12 Step hardware cannot dim the backlight).
12 Step responds to LED control messages on the same channel as Program Change messages, which you
can set in the Settings tab of the 12 Step Editor software.
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In addition to the key LEDs, the four-character display on the 12 Step2 can also be controlled by sending CC
messages to the USB MIDI Port.
The four characters on the display are addressed using four CC messages:
• CC 50 = first character
• CC 51 = second character
• CC 52 = third character
• CC 53 = fourth character
Each CC should be sent with a value between 48 and 90. These values correspond to the following:
• 48-57 = Numbers 0-9
• 65-90 = Letters A-Z
• 58-64 = various symbols/characters (or blank spaces)
For example, to make the third character display the number "3", send CC #52 with a value of 51.
12 Step responds to display control messages on the same channel as Program Change messages, which you
can set in the Settings tab of the 12 Step Editor software.
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