Log in to your Synctuition account and go to your Profile and click on the Personalise your journeys button. There will be a RECORD YOUR VOICE button on the right. From there, follow the prompts to record our voice.
Please note that you won’t hear your voice in a way you can recognize, it will be encoded as a modulated frequency. You can read more about it here: https://synctuition.com/web/science/.
The voice personalization is an additional option that works separately from the binaural beats, rhythmic entrainment frequencies, and the 3D sound, so even when you don't record your voice you still get the benefits of these features. The voice personalization adds a subliminal touch in the frequency of your own voice to help you breathe and relax. If you don't read these words in, then that feature will be missing. But you will not have a disadvantage to your edition if you don't have this feature.