HI, yes A little more background ... we are implementing research algorithms for hearing aids ... so ... we have many mic inputs and stereo output ... we want a digital interface to the laptop. Need 6 analog inputs Need 2 analog outputs Need minimal latency both in and out as it is a collect/process/output system. Sample rates anything between 22050 Hz and 48 kHz is good at this point. At the moment we can get about 3 ms with an off the shelf firewire/usb card @ 48 kHz, however when we load the CPU with DSP algorithms, we sometimes need to bump up the frame size and thus the latency goes up ... We are running a realtime patched kernel. I have found that there is about 2/3 of the latency in hardware buffers. So we are still open to better USB/Firewire hardware, however would prefer more bandwidth and hopefully less latency to the device. This is why I asked about ethernet and possible PCMCIA. Matt > Matt Flax wrote: >> We are after an ultra low latency connection to a multichannel in/out >> sound card for a laptop. We want a portable system and don't want to >> network to a different computer to achieve this goal. >> >> As we are after ultra low latency, we are interested in both PCMCIA and >> ethernet (gigabit) solutions. >> >> Is anyone aware of any such ultra low latency hardware ? > > Can you define what you require. > > Do you want analog or digital audio I/O? > > Do you need low latency in, out or both? > > What samplerates do you need? > > What latency would be acceptable (say how many milliseconds or > microseconds). > > regards > > Eliot > > > > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
