#11596 HIGH Not Tri: Distance reports very wrong distances on XO-1.75

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Thu Sep 10 18:46:00 EDT 2015

#11596: Distance reports very wrong distances on XO-1.75
            Reporter:  carrott       |          Owner:  godiard
                Type:  defect        |         Status:  new
            Priority:  high          |      Milestone:  Not Triaged
           Component:  acoustic-     |        Version:  Development build
  measure-activity                   |  as of this date
          Resolution:                |       Keywords:
          Blocked By:  12606         |       Blocking:
Deployments affected:                |  Action Needed:  code
            Verified:  0             |
Changes (by Quozl):

 * next_action:  diagnose => code
 * milestone:   => Not Triaged


 In release 13.2.5 on XO-1.75 the causes of this problem were:

 * digital feedback through ADMA, leading to corruption of capture data,
 solved by using only half of the ADMA region,
 * playback during capture interrupted the capture, leading to loss of
 capture data, solved by making the codec always the i²s master,
 * playback and capture rates were different, leading to the playback being
 shorter than it should be, solved by making the codec capable of all

 Capture pops (#12916) were not a problem, because the Distance activity
 already skipped over that time period of the capture.

 In tests with these fixes, the Distance activity is reporting more
 consistent results.

Ticket URL: <http://dev.laptop.org/ticket/11596#comment:19>
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