[LAU] linux compatible USB Audio Interface

jwind wind at mikrokiko.de
Fri Aug 9 17:30:06 UTC 2013

--> bingo; running now for 1,5 hour with no underruns;
had this issue years ago, too... thought with stronger cpus this
supposed to be history; but it isn`t.
now i know. thanks a lot
j ,.

On 09.08.2013 11:46, david wrote:
> Hmm - blacklist the wifi drivers? I understand that even when you're 
> not connected, they will still regularly scan for signals. I 
> understand this can take time and is not RT-friendly at all.
> I have a dual-core netbook (non-RT kernel, it's borrowed). During the 
> day, it sits on my desk at work and plays music from a USB drive thru 
> my UCA-202 USB soundcard. When I close up at the end of the day, JACK 
> will show 9-11 xruns.
> On 08/08/2013 11:09 PM, jwind wrote:
>> just for completeness:
>> after checking out the scarlett 18i8 with another system (a
>> dual-core-netbook)
>> i have some not so nice drop-outs in playback, which not seem to be 
>> related
>> to any latency settings. (-
>> tried to debug a bit, but could not find any errors in kernel- or device
>> logs;
>> does anyone know a good practice how to filter this?
>> thanks james for that hint.
>> j ,.
>> On 08.08.2013 20:59, Victor A. Stoichita wrote:
>>> On 8 August 2013 00:51, Danni Coy <danni.coy at gmail.com
>>> <mailto:danni.coy at gmail.com>> wrote:
>>>     the Komplete Audio 6 is plug and play on Linux. It 4 inputs though
>>>     only two have preamps and is bus powered. The bundled native
>>>     instruments software will run under wine as a windows VST which is
>>>     a bonus.
>>> Interesting! I'm also loking  for a USB 2 interface and the KA6 seems
>>> to fit my needs. It is advertised as being capable of very low
>>> latencies. Did you have any experience of this on linux ?
>>> Regards,
>>> Victor
>>>     On Thu, Aug 8, 2013 at 4:38 AM, James Stone <jamesmstone at gmail.com
>>> <mailto:jamesmstone at gmail.com>> wrote:
>>>         On Tue, Aug 6, 2013 at 3:42 PM, William Light <wrl at illest.net
>>> <mailto:wrl at illest.net>> wrote:
>>> > occhi,
>>> > any particular reason you want an interface with a separate
>>>         power plug?
>>> > USB bus power will do most of what you want.
>>> >
>>> > personally, i currently have a focusrite scarlett 2i2, and
>>>         the 2i4 may
>>> > suit your needs. the 2i2 is good, sounds fine, good latency.
>>> >
>>>         I have a 2i4 - it only has 2 inputs though (as the name
>>>         suggests). It
>>>         is an excellent device overall, but I have been having some
>>>         serious
>>>         teething troubles with kernel releases over 3.5. I am
>>>         providing bug
>>>         reports to the kernel devs and these problems (not being able
>>>         to start
>>>         at low latencies, audio system locking up) seem to be slowly 
>>> being
>>>         addressed, but performance is not quite there yet for me, and
>>>         I would
>>>         suggest if you decided to get one of these devices, and are
>>>         affected
>>>         by these bugs, you might experience less pain using the
>>>         earlier 3.5
>>>         series kernels for now. I think that this problem is not just
>>>         limited
>>>         to the scarlett devices, and that other USB audio devices 
>>> may be
>>>         similarly affected. Also, I think these issues may also be
>>>         USB-hardware (or BIOS?) dependent, so some people with the
>>>         same kernel
>>>         and audio device may not experience the same bugs.
>>>         James

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