Re: [Jack-Devel] Very low latency audio

note that the lower limit for PCI burst transfer is 64 bytes, which means
that if you are only schlepping around two channels worth of 16 bits each,
you need 16 samples minimum to be able to launch a DMA transfer.

obviously higher channel counts reduce or eliminate this problem.


On Fri, Sep 20, 2013 at 8:35 AM, John Reed <[hidden]> wrote:

> Hello,
>
> On my netbook, I was able to start jackd with
> jackd -P62 -dalsa -dhw:0 -r44100 -p16 -n2
> but the hardware driver didn't support -p8 or -p4.
>
> -p16 already requires a lot of fast interrupts, so I assume that to use
> this reliably, I would have to be very careful about setting all of the
> kernel switches, etc.
>
> Is there any hope for getting -p8 or -p4 working, even if I have to write
> my own custom device driver? Or has anyone done any work in connecting
> xenomai to jack? Would I be better off writing a xenomai application and
> then find a way to connect it to an ALSA driver directly?
>
> Cheers,
> John
>
> 
> Jack-Devel mailing list
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>
>

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