[LAU] Focusrite 2i4

[James Stone]

You might try emailing Alan Stern about this. Could be related to kernel
USB handling..

James
On 10 Jan 2014 16:30, "Kees van Veen" <kees.vanveen at gmail.com> wrote:

> [James Stone]
>>
>>> Thanks for testing this.. Quite weird - so you are getting crackles
>>> even at 1024x3!!? That sounds really odd and definitely an
>>> unacceptable performance. I have definitely not heard anything like
>>> this on my device. I wonder if it is some kind of hardware fault. Are
>>> you able to test it on a mac or windows comupter?
>>>
>> No such systems around here, so that's unlikely to happen.  I might be
>> able to try it one of these days on different linux USB host hardware,
>> we'll see.
>>
> Not sure if it has anything to do with it, but I experience 'static'
> crackles on my Presonus 1818 as well.
>
> Have to try my old laptop still, but on my new one the crackles sometimes
> coincide (from watching tail -f) with
>
>     kernel: [12263.813466] usb_submit_urb: -16
>
> in the syslog/kern.log, and an occasional
>
>     kernel: [12261.509328] retire_capture_urb: 2 callbacks suppressed
>
> Do you have that as well ?
>
> I'm on Ubuntu 13.10 / 3.11.0-15-lowlatency.
>
> Thanks,
> Kees
>
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