[Bugs] #3922 Measure UNSP: Measure's tone generator may go below what a XO's speakers can generate

[Sugar Labs Bugs]

#3922: Measure's tone generator may go below what a XO's speakers can generate
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    Reporter:  greenfeld                  |          Owner:  walter                     
        Type:  defect                     |         Status:  new                        
    Priority:  Unspecified by Maintainer  |      Milestone:  Unspecified by Release Team
   Component:  Measure                    |        Version:  Unspecified                
    Severity:  Unspecified                |       Keywords:                             
Distribution:  OLPC                       |   Status_field:  Unconfirmed                
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 Measure's tone generator for tuning instruments may go below what a XO can
 generate.

 For example, the C3 (130.8 Hz) of a Viola cannot be generated on a XO-1.75
 with the internal speakers regardless of volume level (it can be heard
 with external headphones).  The G3 (196 Hz) can be heard with the internal
 speakers.

 A D3 (146.8 Hz) can be barely heard suggesting we have a cutoff around 150
 Hz.

 We might be able to compensate by raising the generated volumes at lower
 frequencies as a "hearing aid" but I do not know how well this will work.

 Heard in OLPC 13.1.0 os2.

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Ticket URL: <http://bugs.sugarlabs.org/ticket/3922>
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