The instructions say :

1. I press Magic button during 3 seconds
2. I enter the code : 975
3. I press the red button
4. I press the button I want to learn on the original remote
5. I press the new button on the All In One remote

6. To finish the learning, I have to press "Mono / Stereo" on the All In One remote
7. I press Magic button during 3 seconds