#10122 HIGH 10.1.3: distance not working well on XO-1.5

[Zarro Boogs per Child]

#10122: distance not working well on XO-1.5
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           Reporter:  dsd                        |       Owner:  bemasc       
               Type:  defect                     |      Status:  new          
           Priority:  high                       |   Milestone:  10.1.3       
          Component:  acoustic-measure-activity  |     Version:  not specified
         Resolution:                             |    Keywords:               
        Next_action:  review                     |    Verified:  0            
Deployment_affected:                             |   Blockedby:               
           Blocking:                             |  
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Comment(by godiard):

 I am testing showing the signal in the GUI. Testing this, i commented the
 line what delete the recorded file and prepared a set of test files.
 Almost all the files start with  200 milliseconds with the max negatives
 values, and then a curve to cero. If you copy the files CairoPlot.py and
 testgraph.py to the Distance.active directory can generate similar images.

 I think this can explain why adding time before the play of the first
 sound, i have better measurements. But why is happening? The device is
 sleeping? Can we awake it before start arecord or it's a bug in arecord?

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Ticket URL: <http://dev.laptop.org/ticket/10122#comment:19>
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