#11187 NORM 1.75-so: XO-1.75 activity and application audio sounds raspy

[Zarro Boogs per Child]

#11187: XO-1.75 activity and application audio sounds raspy
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           Reporter:  greenfeld  |       Owner:  saadia       
               Type:  defect     |      Status:  new          
           Priority:  normal     |   Milestone:  1.75-software
          Component:  kernel     |     Version:  1.75-B1      
         Resolution:             |    Keywords:               
        Next_action:  diagnose   |    Verified:  0            
Deployment_affected:             |   Blockedby:  10831        
           Blocking:             |  
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Comment(by wad):

 One source of this problem has been identified by the Quanta team.  The
 trace impedances on the XO-1.75 right speaker are too large, providing a
 large ringing on that speaker.

 This will be fixed on C1 pre-production models.

 The other problem identified by Mitch in #11170 will also affect Linux
 applications.  That is the lack of digital anti-aliasing when operating at
 lower sample rates.  One suggestion to fix the problem is to remove
 support from the Linux driver for the lower sample rates, only allowing
 22.05 or higher.  I assume that since applications on XO-1.5 dealt with a
 fixed 48 kHz, this is handled by a higher layer of software ?

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Ticket URL: <http://dev.laptop.org/ticket/11187#comment:5>
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