We invited two stakeholders to have a test on our prototype. Both of them were happy with current using experience with a little suggestion gave our for future developing. They think we can add some feedback while users press the wrong key and have some instruction of before use the product. 

Our prototype turned out to be success and testers were satisfied with using it. However, there still have some issues could be optimized to make the proto- type perfect.

For the Light Bar Indicator:

• Add tutorial of how to use the keypad to select different functions
• Try to achieve function of scanning printed score, so users can scan their physical score in music library for practice
• Misc lick notification on keyboard(audio & visual feedback) for better practice

For the UI:

• Improve workflow for better using experience
• More functions for inclusive design could be added
• Achieve connection of APP and indicator in real