> But the laptop is not running realtime linux is it? It has sure it is... > loads of potential latencies and stuff demanding the system's > attention-- page swapping, program swapping, etc. So why would > you think that it would work on Linux without underruns? If > you wnat 1ms latencies, your computer must be feading the > beast at least every .1ms with no interruptions longer than > 1ms. That is not many samples in your buffer. I have no idea > if alsa can be made to work that way. basically we have that setup working on a workstation, so why shouldn't it work on a laptop? Actually, my collegues here "think" in guaranteed time slices in the microsecond or even nanosecond range. For them, 1 millisecond is an eternity where A LOT can be done on modern processors :) Later, Florian >> >> Thanks, Florian >> >> >> >> On 2/22/2008 1:48 AM, Bill Unruh wrote: >>> On Fri, 22 Feb 2008, Florian wrote: >>> >>>> Hi, >>>> >>>> on our IBM/Lenovo T60 laptop, we want higher audio >>>> quality than the built-in HD-Audio, especially low >>>> latency - in the range of 1 millisecond or lower. >>>> >>>> Can anyone recommend a PCCard/Cardbus soundcard, or >>>> possibly a USB card supported by alsa and which you've >>>> been able to run with low latency? >>> >>> The usb audio maudio transit I have been quite pleased by, >>> esp now that the alsa has stabilised for this card. >>> Latency it sseems to me is more a matter of the buffer >>> size that is used than anything else. At 1ms you can only >>> have at most 20 samples in the buffer. That runs the >>> danger of underruns, since something could distract the >>> computer for that length of time. >>> >>> >>>> >>>> Thanks, Florian >>>> >>>> >>>> >>> >> >> > -- Florian Bomers Bome Software ------------------------------------------------------- Music Software, Development Tools: http://www.bome.com Java Sound extensions, plugins: http://www.tritonus.org The Java Sound Resources: http://www.jsresources.org ------------------------------------------------------- Please quote this email in your reply. Thanks! ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
