On Sun, Apr 29, 2001 at 07:33:37PM -0400, Joseph A. Sarlo wrote:
> I've been using the 2.4.1 kernel usb drivers with a Swissonic Studio usb
> digital audio interface on a Toshiba 2105 CDS notebook (OHCI).
> Everything has been working pretty well: full-duplex, 44.1kHz, 16-bit
> stereo. The only problem is that every so often (30 sec to a minute) I get
> a small click when sending audio to the device. It seems that every once
> in a while a zero gets sent instead of what I'm sending, since if I send a
> stream of zeros no clicks are heard and they get progressively louder
> as I send higher DC offsets. I've tried various methods of frags and
> fragsizes as well as monitoring disk activity and the like, but nothing
> seems to completely solve the problem. I imagine somewhere in the line the
> data is being dropped. Has anyone else had any experience with this? Any
> clue? I was wondering if anyone knew whether or not using mmap method
> instead of read/write might help too? Any help would be greatly GREATLY
> appreciated.
Hmm. Notebooks users usually have a battery monitor running (like the
GNOME battery appliet). If you do, disable it and see if it solves your
problem. It worked for me, YMMV.
Erik
--
J.A.K. (Erik) Mouw, Information and Communication Theory Group, Department
of Electrical Engineering, Faculty of Information Technology and Systems,
Delft University of Technology, PO BOX 5031, 2600 GA Delft, The Netherlands
Phone: +31-15-2783635 Fax: +31-15-2781843 Email: [EMAIL PROTECTED]
WWW: http://www-ict.its.tudelft.nl/~erik/
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