5.5 Comments from participants
We also obtained free form comments from the partici-pants. HL wanted the pieces to be colored differently, the pieces be given memos, fewer options for sound alterations, and some suggested that concentration on listening to the sound improves hearing ability. From NHL, we learned that the speech type of sound was easy, whereas the music type was difficult, and that familiar music was easy. In addition, we got many suggestions for improving the game interface.