IK Multimedia iRig Keys 2 Mini 25-Mini-Key USB MIDI Keyboard Controller - Manual (Page 10)

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2 Playing with iRig Keys 2
You can start playing as soon as you connect iRig Keys 2 to your iOS device or computer and launch a virtual
instrument app or plug-in. Pressing the keys on the iRig Keys 2 keyboard sends MIDI note messages. iRig Keys
2 has a 37-note keyboard that is approximately centered in the middle of a full 88-note piano keyboard.
2.1 Octave shift buttons
By default, iRig Keys 2 plays notes between C2 and C5. If you need to play notes lower or higher than this
range, you can shift the whole keyboard in octaves using the OCT up and down buttons.
When the LEDs for both OCT buttons are off, no octave shift is applied. You can shift a maximum of 3 octaves
up or 4 octaves down. OCT up or down buttons will illuminate when an octave shift is active.
The OCT up or down buttons will flash each time you press them.
The number of times they flash corresponds to the number of octaves up or down the keyboard is shifted.
2.2 Volume
This knob adjust the audio level of the headphones output.