Understanding how Rivendell and JACK plug together

Filed under: JACK,Rivendell — Tags: , — frederickjh @ 22:48  

I think one of the confusing things to many new users is how JACK and Rivendell interconnect and how things are labeled. For example Rivendell starts numbering Cards and Ports at 0 while in JACK Ports start at 1.

I am basically going to be  demystifying the JACK.txt file that comes with the standard documentation from Rivendell.

When you setup a [JackSession] section in the Rivendell configuration file, /etc/rd.conf, Rivendell will if it finds the JACK daemon, jackd, running create a virtual JACK card in Rivendell.  The Rivendell daemon caed (Core Audio Engine Daemon) will look first to see if you have any Audio Science audio adapters in the system and will initialize them first. caed will number the first card 0 (Zero). If you have no Audio Science cards in your system  then the virtual JACK card will be card number 0. ALSA cards in Rivendell will come last. You need to have setup an /etc/asound.conf with entries for ALSA (see ALSA.txt for details).

If you look in JACK Control under connections you will see that Rivendell appends the Rivendell JACK client with the number of the virtual sound card that it will be available under in Rivendell. So for example the Rivendell JACK client for cardo will be rivendell_0.

When you first come in to the JACK Control Connections window you will see a list of clients. Clients are JACK aware audio applications that have created JACK ports that you can connect. Clicking the plus next to a client opens the list of ports that that client is making available.

If there is one Audio Science card, the Audio Science card would be numbered card 0. The virtual JACK card would then be numbered card 1 and appear in JACK Control under connections as the client named rivendell_1.

Rivendell will automatically make the JACK connections that are setup in /etc/rd.conf. These consist of a Source and Destination line in rd.conf. This is followed by a number that need to match. So, that Source1  will be connected to Destination1.  Sources are on the left-hand side in JACK Control in the column with the heading “Readable Clients / Output Ports”. Destinations are in the right-hand side column with the heading “Writable Clients / Input Ports”.

Rivendell’s output and input ports are stereo. JACK’s ports are mono. This means that if you setup and application to use Card0 and Port0 in the connections window in JACK Control you will have 2 ports one for the left and one for the right channel.

On an Ubuntu computer the ALSA sound card show up as the client system.

You might get confused by the terminology used for the port names, but if you remember the ports on the left are providing audio and the ports on the right are wanting to receive audio it makes things easier. Also note the icons to the left of the port names. Microphone icons are by the ports providing sound while the ports that we can send sound to have speaker icons next to them.

For  an example of the terminology the Rivendell client uses the terms for the ports playout and record.  The system client uses the terms capture and playback.

Now for an example to put it all together.  The JACK Virtual card in this example is Card0 and we are assigning RDAirplay to playout on port0. We want to monitor this on our computer speakers which are attached to our ALSA sound card that is represented by the playback_1 and playback_2 ports (Left and Right channels).

To have the port connected automatically when Rivendell starts we have the 4 lines in the [JackSession] section of /etc/rd.conf



OK, so lets break it down. The Source and Destination with the same number will be connected. So, each pair needs a unique number in the configuration file. Easy enough, I hope.

The part on each line after the equal sign (=) is the client name and port name with a colon(:) in between.

So in the example lines from rd.conf the first two lines connect the left channel of RDAirplay with the left channel of the sound card and eventually with the left speaker. The next two lines do the same for the right channel.

I hope that helps someone to understand a bit better interfacing JACK and Rivendell.


So you want to have JACK with your RRAbuntu?

Filed under: JACK,Rivendell,Rivendell Installation — frederickjh @ 23:26  

After folks get past the easy install of Rivendell they many times hear about JACK and all the neat things you can do with it. However, JACK is a program that has a lot of twists and turn to figure out mostly because the packagers have decided against a one-size-fits-all setup. The Ubuntu/Debian packages for Rivendell seem a bit that way too considering how much “tweeking” we do after the packages are installed to get it to work correctly on RRAbuntu.

Now I would not say RRAbuntu is a one-size-fits-all installation. It is more like a it-is-a-good-place-to-start-and-it-works-this-way-so-why-fix-it installation (Just try and say that 5 times fast! ;) ).

The biggest issues with getting JACK setup are:

1) Figuring out JACK’s idiosyncrasies

2) Figuring out the best way to interface JACK with current sound systems

3) Figuring out the best way to interconnect JACK aware programs with JACK

Now before we begin, why might you want to setup JACK with RRAbuntu? With the default RRAbuntu installation we use ALSA and disable Pulse Audio. We do the later because we do not want Pulse Audio to grab the sound card and then Rivendell cannot use it.

ALSA only allows one audio application at a time to use a sound card. You could install another sound card and use one for Rivendell and the other sound card for other applications. However, I am not going to cover that in this post.

With JACK we still use ALSA but JACK handles all the connection to ALSA. The best way to think of JACK is like a big patch panel for audio. We can connect audio applications and sound devices together automatically or manually. This allows us to have Rivendell on a computer and also run Audacity to edit some audio and still be able to hear it. JACK stands for the Jack Audio Connection Kit . It is a recursive acronym in that it refers to itself. Considering that ack is a sound of disgust in some places in the world it is all the better to name it JACK and not ACK.

But some of you may say, “Hey what about Pulse Audio? It is the default sound system on Ubuntu and I want to hear the system sounds and such.” Well since the last version of RRAbuntu was released (1.13) I have learned how to interface JACK and PulseAudio so that you can have sound from non-JACK aware applications as well, however this has proved not so stable in testing when stopping and restarting jackd. I am still working on this but the fact that a reboot was needed to allow jackd to start again is not a good thing in my book. I need to research that setup more.

So, on to the setup. First the assumptions. You did an install from the RRAbuntu 1.13 CD and ran the First Run script. This may work with other Rivendell versions (1.7.2 is what we are testing with) or other releases or Ubuntu distros (Ubuntu Lucid 10.04 LTS in what we are using). And once again the point is not to assume you know anything nor to teach you, so if you learn something that is great bit it may take a bit of reading up on your part.

1)  Stop the Rivendell daemons

sudo /etc/init.d/rivendell stop 

2) Setup a startup script which waits to start Rivendell until jackd has started. Download the startup script from my blog post here (right-click> “Save Linked Content As…”) and save it as /etc/init.d/rivendell. Make it executable and change the variable WAITFORJACK=0 to WAITFORJACK=1.

You can do this with the commands:

sudo wget -t 0 -O /tmp/rivendell.init http://ubuntuone.com/p/HNF/
sed s/WAITFORJACK=0\ \ #1=yes\ 0=no/WAITFORJACK=1\ \ #1=yes\ 0=no/ /tmp/rivendell.init | sudo tee /etc/init.d/rivendell >/dev/null
rm /tmp/rivendell.init

3) Setup Jack Control as a Startup Application with the following command:

echo "
[Desktop Entry]
Name[en_US]=Quick Jack Control
Name=Jack Control
Comment[en_US]=Starts Jack Control and the jack daemon
Comment=Starts Jack Control and the jack daemon
 " > ~/.config/autostart/qjackctl.desktop 

4) Add a  Jack section to /etc/rd.conf with the command:

echo "
; JACK Session Management
; See /usr/share/doc/rivendell/JACK.txt for details































" | sudo tee -a /etc/rd.conf > /dev/null

5) Setup Jack Control to start jackd and other needed settings with the commands:

mkdir ~/.config/rncbc.org/

echo "[Splitter]
AudioConnectView\sizes=248, 83, 248
MidiConnectView\sizes=34, 20, 34
AlsaConnectView\sizes=34, 20, 34
PatchbayView\sizes=34, 20, 34




StartupScriptShell=artsshell -q terminate
PostShutdownScriptShell=killall jackd
XrunRegex=xrun of at least ([0-9|]+) msecs



StartupScriptShellComboBox\Item1=artsshell -q terminate
PostShutdownScriptShellComboBox\Item1=killall jackd
XrunRegexComboBox\Item1=xrun of at least ([0-9|]+) msecs
" > ~/.config/rncbc.org/QjackCtl.conf

6) At this point the easiest thing to do is reboot the computer. This will start the Rivendell daemons, JACK Control and jackd and set the proper group permissions.

7) Set Audio Output and Inputs up in RDAdmin to use the outputs and inputs you want for each Rivendell application. First go to RDAdmin>Manage Hosts> select the host >Edit>Audio Resources Scroll down and look for the title “AUDIO ADAPTERS“. Under it it should say:

Card0: JACK Audio Connection Kit
  Driver: JACK Audio Connection Kit
  Inputs: 8
  Outputs: 8 

If it does then you can click Close.  In the Host: menu that you will be looking at you can go in to RDLibrary, RDCatch, RDAirplay, RDPanel and RDLogEdit and assign what inputs and outputs you want to use for what functions in those programs. Jack has 8 inputs and outputs numbered 0-7 The card number will be 0 as that is what card we have JACK setup as. By default they will be set to Card 0, Port 0.

8 ) Check connections in Jack Control. Click on the JACK icon in the task bar, then click on the Connect button.   Check that you have connections between the rivendell_0:playback ports and the system:playback ports so you can hear sound in Rivendell. You should see a line connecting them.

JACK Control Taskbar Icon - A Diagonal TRS (Tip, Ring, Sleeve connector) or a headphone plug if your not sure what that is ;) and a white circle with, hopefully a yellow play symbol

JACK Control Taskbar Icon

The yellow play symbol in the JACK Control taskbar icon means jackd was started by a program other than JACK Control. A green play symbol means jackd was started by JACK Control. In the screen shot above I had started it from the command line.

9) Test: Play a sound in Rivendell and see if it works!

Again if you don’t want to do all that copy and pasting I am providing a script that will do all this for you. One word of warning do not have any other package managers running when you try to run the script. Especially keep an eye out for the update manager. It has a way of automatically starting and then minimizing itself.

You can download the rrabuntuandjack.sh script here.

Happy patching!


Installing Rivendell the “hard” way – Ubuntu 10.04LTS – Rivendell version 1.7.2

Filed under: Rivendell,Rivendell Installation — frederickjh @ 02:57  


You might ask why I choose the title I did. Why the hard way?  Well it is because others and myself  have worked so hard to make Rivendell so easy to install on Ubuntu. But it seems that some people want to do the heavy lifting themselves and jump into Rivendell (Linux and the command line too) head first. Now by working on RRAbuntu I am not wanting to end up with what Ham(Amateur) Radio operator call “appliance operators”.

This term refers to people that can use something but have absolutely no idea as to how it works. With true every day appliances this may not be a bad thing. Does the average person need to know how the toaster works to enjoy toasted bread. Not really but if something breaks the average person is going to just put the toaster in the garbage and get a new one. :(

A radio automation system is not a toaster. Someone will need to know how to administer the system, period! Otherwise one day it will burn your toast or stop working. Setting up a radio automation system is not a matter of plugging it into the power and inserting bread.

The point of RRAbuntu is to get people over that initial installation learning curve that meant for many that they walked away from Rivendell sans toast. They never figured out how to plug it in or where to put the bread. I find this sad and it is the reason RRAbuntu exists today.

That all said if you think that installing Rivendell will some how magically teach you what you need to know about administering it, or you like to learn things the hard way, then this tutorial is for you. Don’t get me wrong. You will learn some things, some useful and other will be just frustrating. I will not assume you know anything but I will not attempt to teach you what all the commands that we will use mean. That is up to you to figure out.

I highly recommend cutting and pasting the commands into the terminal. Be especially careful of long commands on narrow screens as you may need to scroll to the right to select all of the command. The command line can be a very hard place. One false character including spaces could mean the command does not work.

Note I said hard way not the hardest way as there are two harder ways to install. Next in hardness is compiling and after that compiling from cvs. So, I you are just looking for something really hard to do you may want to move on and go straight to compiling the cutting edge, bleeding heart code from cvs that may or may not work.

Be for warned that for this installation I am going to be very narrow and focused. Others have published tutorials. There is a INSTALL.txt included with the source code when you compile. There is also the very good blog post by Alban. However even he was broader than I am going to be as his tutorial was for Debian and Ubuntu.

I will be using Alban blog post and the scripts that we use in RRAbuntu as the basis for this tutorial. I will focus this tutorial on Ubuntu and specifically Ubuntu 10.04 LTS (Long Term Support) release and Rivendell version 1.7.2 and only one sound card. If you choose to use this tutorial with any other Linux distro, Ubuntu release, or Rivendell version it just might not work, unless you know how “this” toaster works. ;)

So, please do not post comments asking how to plug in a different Linux toaster or where to put the toast in an other Ubuntu release, or how to output or input toast  from more than one toaster at a time. ;)

Since you are doing things the hard way I will let you figure out how to install Ubuntu 10.04 LTS on your own. I also trust that you have an ALSA compatible sound card on the computer you are going to install on.

Before you start to install Rivendell you need to decide what to do with Pulse Audio. This is the default sound system on Ubuntu. You need to make the hard decision of what to do with pulse audio. I will present two options.  Option one works with the ALSA sound  system and the other with JACK and Pulse Audio.

Option A is to basically turn Pulse Audio off and there by allow Rivendell to be the only application to use the sound card using ALSA. Thats right in this option no other program can use the sound card, but hey maybe this is what you want if this is your on-air log playback computer. You do not want systems sounds going out over the air in addition to what is playing in Rivendell.

Option B is to setup Rivendell with JACK and set up Pulse Audio to work with JACK. This allows you to still use your sound card with other applications in addition to Rivendell. However, this is even harder to setup as you need to setup jack, get jack and the daemons to all start in the correct order, etc.  So, for now I am not going to cover how to do this, but if enough people ask in the comments I might make a future blog post with that info.


I would highly recommend that you read to the end  of this blog post before starting to work through these installation instructions.

Step 1. Say goodbye to pulseaudio. I am taking much of this from the Rivendel wiki page that I put together on it. You need to copy /etc/pulse/client.conf to ~/.pulse/client.conf.  Use this command to check if you have a .pulse folder and if not, make it.

if [ ! -d ~/.pulse ]; then mkdir ~/.pulse; fi

Now you can copy client.conf with the following command in a terminal:

cp /etc/pulse/client.conf ~/.pulse/client.conf

Then and change the line: ; autospawn = yes to autospawn = no by running in a terminal the following commands :

sed s/\;\ autospawn\ \=\ yes/autospawn\ \=\ no/ ~/.pulse/client.conf >/tmp/temp.conf

cp /tmp/temp.conf ~/.pulse/client.conf
rm /tmp/temp.conf

Now we need to kill and running instances of Pulse Audio with:

killall pulseaudio

After that run

ps -C pulseaudio

to check if pulseaudio is still running.  If you do not get back something similar to:

17065 ?        00:00:02 pulseaudio

Then pulse audio is still running, however if you get back:


Then all is well and pulse audio is not running anymore. However if each time you run the command to kill pulse audio it is still there when you run the command to check if it is running and the PID number keeps going higher then you have not turned off autospawning. Maybe you edited the file by hand and missed the fact that you needed to delete the semicolon(;) at the front of the line in client.conf Well one step down, want to continue or are you ready to do download the RRAbuntu CD and drink your favorite beverage in the mean time?

Step 2. Add  the Tryphon repository to your software sources. The good people at Tryphon produce packages for Debian and Ubuntu. If you ever have to compile Rivendell you will be thankful for the work they have saved you. May be a good idea to drop them a thank you for packaging and maintaining the repository for Rivendell among other programs. The repository is locate at debian.tryphon.eu and there you can read more about it. However, what you want to do right now is tell our computer to use the tryphon repository as a software source.

echo 'deb http://debian.tryphon.eu lucid main contrib #Tryphon-Rivendell
deb-src http://debian.tryphon.eu lucid main contrib #Tryphon-Rivendell Source' >/tmp/rivendell.list
sudo cp /tmp/rivendell.list /etc/apt/sources.list.d/
rm /tmp/rivendell.list

Next we need to add the repository key with the command:

 wget -q -O - http://debian.tryphon.eu/release.asc | sudo apt-key add -

Then make apt aware of the new Tryphon software repository by issuing the following command:

sudo apt-get update

Step 3. Install needed MySQL packages (client and server) as the tryphon packages do not have them listed as a dependency so  they will not be installed automatically when installing Rivendell. You also need to start the MySQL server. You can do this with the commands:

sudo apt-get install mysql-client mysql-server
sudo service mysql start

When the Configuring mysql-server dialog pops up answer the “New password for the MySQL “root” user:” with a password. Remember/write this down as you will need it later. <OK> reenter the password and once more <OK>.

Step 4. Setup Linux user  and group that the Rivendell daemons and applications will run as. The following commands will setup the Linux user you are running as as the Rivendell Linux user. I will also use the group rivendell as the Rivendell group.

sudo groupadd -f rivendell
sudo adduser $(whoami) rivendell

Step 5. Setup the Rivendell group, in our case rivendell, with real time running  privileges with the following commands.

echo '@rivendell - rtprio 99
@rivendell - memlock 250000
@rivendell - nice -10' >/tmp/rivendell.conf
sudo cp /tmp/rivendell.conf /etc/security/limits.d/rivendell.conf
rm /tmp/rivendell.conf

After this you need to log out and then back in again for the real time privileges to take effect.

Step 6. Create a ALSA configuration file. Normally you do not need an ALSA configuration file but Rivendell looks for one and more importantly for entries with rd in them. I am going to assume you do not have an ALSA configuration file and we will create one from scratch with the commands:

echo 'pcm.rd0 {
  type hw
  card 0
ctl.rd0 {
  type hw
  card 0
' >/tmp/asound.conf
sudo cp /tmp/asound.conf /etc/asound.conf

Step 7. Create Rivendell configuration file and setup the current Linux user as the Rivendell Linux user with the following commands:

echo '[Identity]






' >/tmp/tmp.rd.conf

sed s/AudioOwner=username/AudioOwner=$(whoami)/ /tmp/tmp.rd.conf >/tmp/rd.conf
sudo cp /tmp/rd.conf /etc/rd.conf
rm /tmp/rd.conf
rm /tmp/tmp.rd.conf

Step 8. Create directory /var/snd for Rivendell audio files and set permissions with these commands:

if [ ! -d /var/snd ]; then sudo mkdir /var/snd; fi
sudo chown -R $(whoami):rivendell /var/snd

Step 9. Create directory /var/run/rivendell for Rivendell pid files and set permissions with these commands:

if [ ! -d /var/run/rivendell ]; then sudo mkdir /var/run/rivendell; fi
sudo chown -R $(whoami):rivendell /var/run/rivendell

Step 10. Install the Rivendell packages and needed dependencies with:

sudo apt-get install rivendell

When the Configuring jackd dialog pops up, answer the question “Enable realtime process priority?” with <Yes>. When the Rivendell configuration dialog pops up answer the question “Configure Rivendell and rd.conf through debconf?” with <No>.

Step 11. Create test tone cart if it failed to be created correctly with this command:

if [[ ! -f /var/snd/999999_000.wav || ! $( stat -c%s /var/snd/999999_000.wav ) -eq 1769528 ]]; then rdgen -t 10 -l 16 /var/snd/999999_000.wav; fi

Step 12. Start Rivendell for the first time. Since this is the first time there will not be a rivendell database. In order to create it you will be asked for the root mysql login and password that you setup when mysql was installed.


A “mySQL Admin” dialog will pop up. “Unable to access the Rivendell Database! . . .”

User Name: root

Password: the one you gave when you setup MySQL.

You should get back a “Created Database” dialog. Click OK and RDAdmin will start.

User Name: admin

Password: This is blank. Don’t enter anything in the password field just hit enter.

You can now start RDAirplay from the Sound & Video menu. Click the Add button, select the test tone, add it to the log, then click start.

Bash Script

I have made a bash script of all the commands in this blog post if you do not want to do a lot of copying and pasting you are welcome to use it. The instruction for it are this.

1. Download it and save it in your home directory. So, if your Linux login is johndoe you would save it as


2. Make the script executable by running the command:

chmod +x ~/lucid-1.7.2-install.sh 

3. Run the script to install Rivendell with the command:


4. Any time you are asked for a password at the command prompt like so, “[sudo] password for johndoe:“, enter your Linux password.

5. Any time it asks you on the command line “Do you want to continue [Y/n]?” just hit the Enter key to answer yes.

6. When the Configuring mysql-server dialog pops up answer the “New password for the MySQL “root” user:” with a password. Remember/write this down as you will need it later. <OK> reenter the password and once more <OK>.

7. When the Configuring jackd dialog pops up, answer the question “Enable realtime process priority?” with <Yes>.

8. When the Rivendell configuration dialog pops up answer the question “Configure Rivendell and rd.conf through debconf?” with <No>.

One thing that I experience a couple of times and figured out how to get around it by accident, is that before the Configuring jackd dialog  comes up my terminal went blank. That is correct, all the text in the terminal disappeared. I waited a while to give it time to come up switch to another open program and back, but only when I in the terminal when to File>Open Tab and then switch back to the original tab that the script was running in did I see the “Configure jackd” dialog.

You can download the bash installation  for Rivendell 1.7.2 on Ubuntu Lucid 10.04 LTS script here.


After five working installs of Ubuntu Lucid 10.04 LTS (and two failed with disk errors), I managed to get everything working correctly in the right order. So this is not a off the cuff blog post that has not been tested or tested on a system that was halfway configured. I hope that this will help some people just like RRAbuntu has to be able to install Rivendell for the first time easily.  


RRAbuntu 1.13 Pre-Install/Demo walk-through

Filed under: Rivendell,RRAbuntu — frederickjh @ 12:03  

Hi all!

In my work on the RRAbuntu project we have endeavored to make the installation of Rivendell and Ubuntu as easy as possible. The project went from being commands to run in the terminal to get it all setup to what it is today a script with a GUI interface that helps the installer through the process.

It seems that some are still having problems with understanding what to do once the RRAbuntu 1.13 CD boots up. So, in the spirit of trying to make things easier here is a walk through that should get you either demoing or installing RRAbuntu.

If you insert the CD and then boot the computer, if your computer is setup to boot off of CDs it will load up. First you will see a screen with an icon at the bottom.

Keyboard press = human intervention

Just wait. In time you will see this screen. It can take some time for this as the computer needs to uncompress the operating system. The time it takes depends on your computer speed, amount of memory and CD/DVD drive speed. Do not do anything until the desktop with icons appears.


Select "Try Ubuntu 10.04 LTS"

Here you can select your language and then you will want to select “Try Ubuntu 10.04 LTS“. After that you will see the desktop and a read me file will be brought up in a window like this:

RRAbuntu Welcome Readme - Screenshot

Just a readme not a menu.

This is just a readme not a menu. To run the demo double-click on the icon on the desktop labeled “Demo RRAbuntu” to install RRAbuntu double-click on the “Install RRAbuntu” icon.

RRAbuntu Desktop icons

Click on these icons to demo or install RRAbuntu

After clicking on these icons a script will be started that will walk you through the process. If you click on the Install RRAbuntu icon you will see this  dialog with a question pop up to confirm that you really want to install.

Install RRAbuntu?

Install RRAbuntu?


Testers Need for Rivendell start up script on Ubuntu Lucid

Filed under: Rivendell,Rivendell Development — frederickjh @ 17:08  

I think I have managed to solve the realtime priorities issue with the ubuntu sysv startup init script. However now I need testers to test and see if the INIT INFO header that I added will be honored by upstart. I am not ready to write upstart scripts for Rivendell yet. They say on their site that the format for the scripts is not totally set and could change so I am trying to get the sysv init script to where it works. I do not have a fast enough test machine for this. I know some on the list have reported this problem. I had one report where they cpu was a Intel(R) Core(TM)2 Quad CPU Q9400 @ 2.66GHz.

The symptoms are Rivendell does not start or complains that /var/run does not exists. There maybe others. The problem only occurs on boot up. After the boot up is complete starting Rivendell works fine.

If you are interested in testing download this shared file and follow the instructions contain therein.


I have also added a feature where the script will wait for jackd to be started if you set a variable for that.

How to get Rivendell to start with Real Time Priorites on boot up

Filed under: Rivendell,Rivendell Development — frederickjh @ 13:37  

You may have noticed on your Ubuntu install (using debian.tryphon.org packages, this includes RRAbuntu Live CD Installs) of Rivendell that real time priorities do not get enable when it starts on boot up but if you restart after booting it does.

This assumes you have setup (or it was setup for you) like in this Rivendell wiki page on real time limits.

If you check your messages log. System>Administration>Log File Viewer>messages

You will find lines that either say Rivendell started with real time priorities or not.

Sep 23 16:12:47 rrabuntu caed: using realtime scheduling, priority=8

Sep 22 16:19:16 rrabuntu caed: Unable to set realtime scheduling: Operation not permitted

Obviously the second line is not what you want to see. It appears that the the problem is the start-stop-daemon that is being used in the sysv init script. Replacing the line from /etc/init.d/rivendell

start-stop-daemon –start –oknodo –chuid $DAEMON_USER –exec “/usr/bin/$daemon”

with a simple su command to change the user, like so:

su $DAEMON_USER -c “/usr/bin/$daemon”

allows the Rivendell daemons to start with real time priorities on boot.

Happy real time priority booting of Rivendell!

PS Any feedback on whether this still allows jackd to work with Rivendell would be appreciated.


RRAbuntu Live CD in other languages

Filed under: Rivendell,RRAbuntu — frederickjh @ 15:02  

If you run the RRAbuntu Live CD in demo mode it normally comes up in English, but maybe this is not your preferred language. What to do? As the CD is booting up there will appear a screen with the word Ubuntu and the Ubuntu logo. At the bottom of the screen you will see:

Keyboard press = human intervention

Basically this means a keyboard press = human intervention. When you see this pressing any key on the keyboard will take you to a menu that will allow you to change the interface language by pressing F2. You can also change the default keyboard by pressing F3.

After that select “Try Ubuntu without installing” (top menu entry) in your language to boot RRAbuntu from the CD.  With the current RRAbuntu (v1.13) the language of the user interface for Ubuntu will be what you selected and also for Rivendell. However the demo and installation scripts will still be in English. Changes will be needed to localize the scripts in future releases. If you find things in Rivendell that are not correctly translated or are not translated it means some work still needs to be done there. See this Rivendell wiki page about translations for more information.