You can switch ON / OFF the Audio Launchpad on the page 2 of the HD Audio Recorder 2's tab and clicking on button beside Audio Launchpad ON / OFF. You can also use the hotkey CTRL + SHIFT + L to ON / OFF the Launchpad.
If you are using this hotkey while in a game, a pop up will appear to notify you whether the Launchpad is set to ON or OFF.
You can change a keyboard shortcut assigned to a pad by clicking on the hotkey field. A blinking underscore will appear. Then, you will be able to choose your keyboard shortcut. If you want to cancel, click on the cross that just appeared near to the blinking underscore.
To customize a pad, click the gear that appears when you hover over the box. You may then choose a sound, a hotkey and the color assigned to the pad. Click "browse" to open your file explorer. Once your sound is chosen, you can click the "play" button to listen to it. For information, Nahimic will cut sounds after 30 seconds. Supported formats are .mp3, .wav and .wma files.