"The sounds in a UI should work like a well-coordinated orchestra, both with each other and within the surrounding interface." - Material design
I decided to go with narrative patterns in the voice interface where the assistant walks the user through the whole application and also responds to the actions with a feedback. Keeping the principles of VUI design by Google Conversation design in mind, we designed the voice over of Jojo in the application:
The voice overs and dialog flow of Jojo should be intuitive, clear and understandable.
The introduction audio by Jojo - "Hello everyone! I am Jojo, let's learn some alphabets today"
Game instructions by Jojo- "This is an apple. Apple starts with letter A. Put the apple in the ring in from of Letter A"
We wanted the sound should be an authentic representation of the Jojo as a friend and instructor. We wanted the voice to be expressing emotion and personality of Jojo. We worked with the voice modulations and made it fun and friendly for kids.
Sound should create a sense of comfort and security – only calling for action when needed. Especially in this case where the learning comes with a bit of frustration with dyslexia, it was important for Jojo to reply with reassuring messages! The success should follow with happy sounds too.
Right answer when the user scores a point