Fedora :: Rakarrack Real Time Audio User Group?
Mar 23, 2011
I'm using a fedora install mainly for audio work and have everything working well out of the box. My setup is simple:
-Direct cable from Guitar 1/4" > Sound Card input>Rakarrack Guitar Effects>Ardour>System Out
(Occasionally I put a synth/plugin like Zynaddsubfx or jackrack before or after rakarrack depending on what sound I'm going for)
-Jack for all audio transport with synthesizers
I have real time support with Jack and all other programs except Rakarrack. When I launch Rakarrack in the terminal, I get this message:
Code:
rakarrack 0.6.1 - Copyright (c) Josep Andreu - Ryan Billing - Douglas McClendon - Arnout Engelen
Try 'rakarrack --help' for command-line options.
Cannot lock down memory area (Cannot allocate memory)
Cannot use real-time scheduling (RR/15)(1: Operation not permitted)
AcquireRealTime error
However, running rakarrack in root does not display this output, and I assume it has no problem getting real-time scheduling in that case. I did some google searches but the only similar issues that I find are that people can't get RT support in jack except in my instance, I do have RT scheduling with jack, but for some reason I can't get it in rakarrack unless I'm root.
[Edit] I actually have to run jackd and rakarrack in root to get rakarrack to use real time scheduling. But, it isn't necessary for any other jack compatible program that I know of. I'm actually not getting any real time scheduling with any jack application, even though Jack is reporting to be running in Real Time. However, running everything in root fixes the issue even though I would prefer to not have to run as root.
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Jun 11, 2011
i am not sure if this hardware section is the proper place to put this question but my problem is like this. I want to record headphone mic input in a local file every time my system boots up and broadcast the real-time audio or rather multicast it through local LAN
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Nov 10, 2010
I noticed that any CPU load, while using Rakarrack guitar effects, causes the sound to distort and it generates loads of noise. This actually happens when using anything while running Jack audio. If I'm recording, I get tons of noise on the recorded track when I play it back (and live when monitoring) because any CPU usage seems to interfere with the signals. It even does it live in the playthrough (monnitor).
I realized it had to do with CPU usage when I noticed a pattern with the noise correlating to the plasma CPU monitor widget I had running originally. The noise refreshed when the monitor did. Since then, I noticed that anything that puts a slight load on the system will cause this disruption (even moving a window around, or anything in the background processes).
Anyone who is experienced with Jack audio, and possibly rakarrack as well, know the cause to this? I figured loading a low resource WM and eliminating unneeded processes can help but it doesn't since the recording program itself, while recording, is enough to cause this problem. (I know this because playing the guitar in Rakarrack, without recording and just using Jack to run the sound to the speakers, doesn't have constant noise but when recording, there is a constant noise)
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Jun 19, 2010
I was wondering if there is an application for Ubuntu (FOSS or otherwise) that would allow me real time management of all of my audio inputs and outputs. Essentially I have multiple microphones attached to my computer and multiple audio outputs. What I am looking to do is to be able to assign each different input to it's own audio output. A touch screen interface is a plus for the program but not necessary.
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Jan 20, 2009
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Here's the link:
[URL]
In order to get users'ip, in jsp, use request.getremotehost() or request.getremoteaddress() by editing the jsp file. I wonder if there's some open source software to use for these two purposes.
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Nov 22, 2009
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Code:
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Code:
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Feb 24, 2010
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Code:
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Code:
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Code:
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