Re: [proaudio] Real-Time for audio playback?

[Grant <emailgrant@xxxxxxxxx>]

>>>>> <SNIP>
>>>>>>
>>>>>> But in the end, there's really no way to know, right?  From what I
>>>>>> gather, jack can add another buffer and report on it, but it's the
>>>>>> sound card buffer that determines whether there are problems or not,
>>>>>> right?
>>>>>
>>>>> No, I think Jack does know.
>>>>>
>>>>> In non-Jack apps the application pumps out data. If the buffers
>>>>> overflow or run empty it's just a 'system problem' and the system has
>>>>> failed.
>>>>>
>>>>> In Jack apps all audio is moved by Jack. All Jack apps are callback
>>>>> based. Jack itself issues a demand for data from the application, then
>>>>> if the application supplies it then everything works correctly. If the
>>>>> app doesn't supply the data then we know where the problem is and we
>>>>> can fix it.
>>>>
>>>> Here's how I understand it.  In a system without jack, there is
>>>> communication between the system and the sound card.  With jack, there
>>>> is communication between the system and jack, and also between jack
>>>> and the sound card.  It sounds like jack can report on problems with
>>>> communication between the system and jack, but we are still left in
>>>> the dark as far as communication problems between jack and the sound
>>>> card.
>>>>
>>>
>>> I don't think so. Jack will report if it had trouble delivering the
>>> data to the card. It's just another xrun.
>>
>> Is that enough information to be sure the card's buffer never runs dry?
>>
>
> I believe it is. Probably you could address really specific questions
> to the implementers for more confirmation, but I'm operating as if it
> is.
>
>>> <SNIP>
>>>>
>>>> Was it the Asus motherboard?  Did it take anything else out with it?
>>>>
>>>
>>> Asus A8N-E. The crash took out the motherboard, the power supply and
>>> possibly a disk drive. At least I cannot get the drive to spin up and
>>> it was a new SATA drive that was the main system drive before the
>>> machine died.
>>
>> I'm really sorry to hear this.  I hope you were able to resuscitate
>> the drive.  Did you choose a reliable motherboard to replace the Asus?
>>  If so, I'm interested to hear how you made a reliability
>> determination.  How's temperature in the case?
>>
>> - Grant
>
> So far the drive is apparently really dead. I haven't done anything
> more. I figure I'll contact WD but it's hard to blame it on them. The
> power supply seems to have been the culprit. It took out the
> motherboard and a cheap ATI VGA also so almost everything in the box
> seems pretty dead. I don't know yet whether my HDSP9652 was harmed,
> nor have I tested my TI 1394 card, but at least the new system
> recognizes them and loads drivers so one of these days I'll hopefully
> get on top of that.
>
> I have more pressing issues right now so those will have to wait a while.
>
> Thanks for the concerns and interest though.
>
> Cheers,
> Mark

Thanks for all your help Mark.  One more question is what kind of
power supply was it?  I use Corsair these days.

- Grant