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Software - sidux audio workstation wiki suggestions
blackhole - Jun 05, 2008 - 12:55 PM
Post subject: sidux audio workstation wiki suggestions
I have found this in the sidux audio workstation wiki:
Quote:
To be able to use the rt-kernel as a user, you have to edit as root the /etc/security/limits.conf file:
@audio - rtprio 90
@audio - nice -5
@audio - memlock 75000
This entry will give the user in the group "audio" the rights to start application with rt-priority.
The highest priority is 99 and should only be for irq's like timer and sound card.
I think, however, that these settings are not right: Midi threads of softsynths/midi sequencers, in a realtime kernel, need a priority between 85 and 95.
You could try with Linuxsampler and Qsampler for example (www.linuxsampler.org). With the settings suggested in the wiki, qsampler is complaining about the impossibility to give realtime priority to the sampler threads. So I think that a maximum priority of 99 is the right one. Remember that this priority is only a theoretical maximum and the real priority is defined by the author of the software or the user, if the option is present in the software.
In my case I am using this one in limits.conf
Quote:
@audio - rtprio 99
@audio - nice -10
@audio - memlock unlimited
This week I was also working on irq priority and maybe I will post some very important suggestions in the next message. With a dual core Intel T7100, 2 Gig of memory, last makke kernel, the latency performance is to be considered poor without tweaking the system.
brummer - Jun 05, 2008 - 01:24 PM
Post subject: RE: sidux audio workstation wiki suggestions
hi blackhole
yes, you are absolutly right. I wrote the sidux audio workstation wiki (german version), khz translate it in english. Please feel free to edit it to your suggestions.
It's a work in progress and of course, I use the same settings then you suggest. 
brummer
brummer - Jun 12, 2008 - 04:53 AM
Post subject: RE: sidux audio workstation wiki suggestions
done