HCI Working Blog

Posts tagged ‘the project’

Real size model

These pictures show a 1:1 representation of the cover used in our second proposal for this project, built using  modeling clay.

The second picture can be used to get an idea about the actual size of the model.


Used patterns

As you can see in the “storytelling” post, some of the elements or actions repeat after a precise pattern. In this post we will explain some of the pattern we will use for making Beethoven’s live better.

  1. Always-visible tools – Like the name says, Always-Visible Tools are always visible instead of hiding them until the user needs them. We have “Home” and “Help” buttons always there ready to be used in any circumstance.
  2. Navigation – The user needs to navigate among sections of the application while having clear indication of what section the user is currently looking at.
  3. Undo – People tend to make mistakes when interacting with applications. Making one mistake can throw away hours of work. Therefore users should have an option to easily undo their actions and get their work back. We have “Backspace” button and the entire “Edit” section of the application built for this.
  4. Input feedback – The user has entered data into the system and expects to receive feedback on the result of that submission. In our case, the users will have the device vibrating and an audio warning when they made a mistake.
  5. Display collection – The user has created a collection and wants to share it with other people.
  6. Direct manipulation – Actions take place with no apparent wait time.
  7. Edit in place – Offers an editor directly in the place where the user could modify a composition.
  8. Spring loaded mode – permitting users to change the mode of interaction by pressing a button (“Change” button).

Use Case Diagrams

Create a new song


Pros and Cons

Cover idea


  • The user recognizes easily the  buttons .
  • The buttons are marked with Braille letters.
  • The “piano” keys have triangular shape and therefore the keys are bigger and can be pressed easier.
  • The navigation between controls and menu is pretty intuitive.


  • The cover is designed for this application only (it can not be used in other contexts).
  • Because of the small size of the screen it is hard to not press by mistake another key.


Help Beethoven

We proposed 3 possible methods of interaction with the application. But now, Beethoven cannot decide which one is the best one for him. So please help Beethoven choose one on them. (more…)

The third idea

Previously we wrote about the first two ideas we had for poor blind Beethoven so now we’ll explain the third one. This one consists in “reading” user’s gestures. The idea is very simple: the user wears gloves that are sensible to pressure.  (more…)


This application is developed for a certain segment of users, namely for those who have sight disabilities. They either lost their sight at a certain age, either are blind since birth. They have different ages and occupations. The table below provides information about them and a brief description of their occupations and their experience with the music.


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