[LAU] help with guitarix settings - jack issue

[jy]

2011/3/27 Peder Hedlund <peder at musikhuset.org>

> Quoting Cedric Roux <sed at free.fr>:
>
>  ----- "Paul Davis" <paul at linuxaudiosystems.com> wrote:
>>
>>  On Fri, Mar 25, 2011 at 7:09 PM, Cedric Roux <sed at free.fr> wrote:
>>>
>>> > something. There are issues, like jack refusing to work with
>>> > buffers of less than 512 frames (I am not with a rt kernel)
>>>
>>> when you say "refuse" do you mean "will not start" or "performs
>>> badly"?
>>>
>>
>> jackd -d alsa -C hw:2 -P hw:0 -r 44100 -p 256
>>
>> leads to:
>>
>> jackdmp 1.9.6
>> JACK server starting in non-realtime mode
>> Cannot lock down memory area (Cannot allocate memory)
>> creating alsa driver ... hw:0|hw:2|256|2|44100|0|0|nomon|swmeter|-|32bit
>>
>
> 1. You aren't running jack with realtime priorities and memory locking.
>   Make sure you're in the audio group, have "@audio - rtprio 99" and
>   "@audio - memlock unlimited" in /etc/security/limits.d/audio.conf and
>   start jack with a "-P 70" flag prior to "-d alsa".
>
As it's Ubuntu 10.10, this configuration takes place in
/etc/security/limits.d/audio.conf instead of /etc/security/limits.conf !
jy


>
> 2. Built in Intel soundcards usually work better with 3 periods per buffer
>
> 3. Why are you using different soundcards for capture and playback?
>
>
>
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