[BRLTTY] missing key release events, was Re: brltty5.2 alpine2.11 cursor tracking

[Dave Mielke]

[quoted lines by Nicolas Pitre on 2015/10/06 at 21:07 -0400]

>OK... Some hacking in the code to make notes duration much longer and 
>the problem becomes obvious. playTune() is fully synchronous and does 
>does not return until noteMethods->flush() is done.  This is enough to 
>miss incoming key events in some cases.  Similar to speech requests, I 
>think playTune() should run in its own thread when they are available.

I'll do that. Thanks.

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