[pulseaudio-discuss] [PATCH] Change the default fragment size to 5 ms

[Raymond Yau]

>>
>> On Ubuntu, since before my time, this has been the default:
>>
>> default-fragments = 8
>> default-fragment-size-msec = 10
>>
>> ...so 8 x 10 = 80 ms. If you end up with 5 x 4 = 20 ms, I think that's a
>> bit too short/sensitive, we should then increase the number of periods
>> to 16 or at least 8 in the same go, so you'll end up with something
>> above 50 ms in total. I think this could help against underruns caused
>> by inoptimal scheduling.
>
>
> Unfortunately, what seems to matter (contrary to my initial mail) is the
total buffer size, which needs to be less than 34 ms. I don't know where
this magic number comes from.
>
> 4 fragments 5 ms each = works
> 4 fragments 8 ms each = works
> 4 fragments 9 ms each = does not work
> 2 fragments 16 ms each = works
> 3 fragments 16 ms each = does not work
> 3 fragments 11 ms each = works
> 3 fragments 12 ms each = does not work
> 2 fragments 17 ms each = does not work
> 6 fragments 5 ms each = works
> 7 fragments 5 ms each = does not work
>
> --

At this exrteme low latency, rewind become un necessary since your ear
won't  distinguish this small difference
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