On Fri, May 28, 2010 at 8:37 AM, <[email protected]> wrote: > On Fri, May 28, 2010 at 08:30:54AM -0700, Niels Mayer wrote: >>[...] > You're close. See the extra hint in a previous post.
It the "close" has to do with jitter: * Something on the USB bus is causing a "periodic jitter" with a cycle of 100Hz? * Something is causing a buffer to become empty every 0.01 seconds and causing a periodic desync? If the "close" has to do with induced or actual 50hz hum, perhaps frequency-doubled via rectification: * something in the USB power supply, as well as how that power supply floats w/r/t ground (ground noise) is the source. Which would agree with the Wolfson experts from http://wolfsonmicro.com/uploads/documents/en/Specifying%20Jitter%20Performance.pdf stating "One of the authors once spent several days trying to track down a low-frequency jitter problem, only to find that it was in fact a problem of LF noise on the voltage reference." Niels http://nielsmayer.com _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/listinfo/linux-audio-dev
