Overall, the voice of the visually impaired subjects. Most commented The overall tone of the app offers a clear, easy listening. The voice alert the media well. Audio instructions clearly. Overall, the sound is clear, however, should be sounding alarm stimulated, then the speech. And sounds alert over to make sure once again sound the description when chasing a bus is delayed too should improve faster than this and it will be on a collision with talk back a little, then it makes you tough little confusing. Audio continues to light if the car stereo and the surrounding environment, the voice explained the operation step by step. Yet compact enough Then I do not understand, probably because it's long. I must go back to a new round. Use words that are easier to understand than this. And do not say too much about the sound, it is clear, easy to understand. Blind people have an understanding of the workings of an application and start using it properly.