On Fri, 2004-03-26 at 16:08, Tim Blechmann wrote: > do you still have a configuration that might _break_ the hdsp? e.g. > booting with acpi enabled? i'm interested in the distortion of the sound > ... > what's the output of jackd -R -d alsa (on the broken system)? does it > complain about anything? > Can we construct some sort of environment to test the problem and gather real data? For instance, if you play a sine wave in some application, and send it to a specific ADAT (or spdif) output, can you loop that ADAT (or spdif) output back into the same card and record it? Can you record it on another spdif enabled recorder and then compare the recordings? I'm unclear whether the same sine wave, transmitted on every output produces the exact same problem. Since cardbus controllers are essentially PCI bridges this means they have buffer memory that is written by DMA devices. Is this problem related to buffer memory being over used? Or is it purely a timing issue? Is the since wave going through the controller, but extra data (all zeros) is being inserted? This probably means an addressing problem as opposed to a data problem. If you install snd-dummy and run Jack can you show conclusively that there is no problem back inside the computer? While it's easy to say this is a card bus problem, what if it's related to some other part of the system? Some carefully constructed experiments could give us a better idea what's going on. Just asking... - Mark
