Get an real-time kernel if possible.
Tune your system:
check here for a test script: https://realtimeconfigquickscan.googlecode.com/hg/
When I need full power I use this script: (I think you have to install some package for this, I dont use ubuntu)
#!/bin/bash
/sbin/sysctl -w vm.swappiness=10 tuned-adm profile latency-performance
Also you have to create a 'audio' group, add yourself to this group and edit etc/security/limits like this: (it seems that ubuntu changed this path for some strange reason, you have to check it)
@audio soft cpu unlimited @audio - rtprio 100 @audio - memlock unlimited @audio - nice -20
2010/9/17 Pedro Lopes pedro.lopes@ist.utl.pt:
Linux-wise, quick pointers:
- rt-kernel
- jack realtime enabled (try lowering latency by manipulating audio buffer
size and period)
- pd (startup flags -rt -jack)
[you should configure jack to run realtime, add audio user to the limits.conf, etc.. etc... see the web or UbuntuStudio low latency tutorial, nice reading] I use H4 audio sound card, native USB audio driver recognized in Linux (Ubuntu 9.10 rt) and have really low latency.
On Fri, Sep 17, 2010 at 3:58 PM, Ed Kelly morph_2016@yahoo.co.uk wrote:
Hi List,
What is the best recipe for low latency, using a laptop with no ieee1394 (firewire) and only USB under Windows or Linux? Metastudio 4 for Pure Data - coming soon!!
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-- Pedro Lopes (ongoing MSc) contact: pedro.lopes@ist.utl.pt website: http://web.ist.utl.pt/Pedro.Lopes
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