Pulseaudio Setup

2011-11-15T12:36:04Z

156.34.100.226:

== Set audio levels with Pavucontrol ==
To configure the softrock server with your soundcard for IQ processing use:
<pre>
pavucontrol
</pre>

In order to install it, submit the following command:

<pre>
sudo apt-get install pavucontrol
</pre>

Choose your Soundcard for IQ processing. If you are running the SDR-Widget your settings should look like in the following two pictures.
=== TX audio levels on the softrock server ===

[[File:Playback.png]]
=== RX audio levels on the softrock server ===

[[File:Recording.png]]

'''Make sure not to set the RX Audio level in the Recording Tab of pavucontrol to 100%. Otherwise you could have audio feedthrough from RX to TX and a distorted TX Audio. A level from 22% - 80% would be ok, but may vary on each system.'''

== Enable network mode ==
You also need to run pulse in network mode. Use:
<pre>
paprefs
</pre>

In order to install it, submit the following command:

<pre>
sudo apt-get install paprefs
</pre>

to set up network access by checking the various option boxes.

If you are using Ubuntu 11.10 there i a bug [https://bugs.launchpad.net/ubuntu/+source/paprefs/+bug/829051] that can be worked around by running this command:

<pre>
sudo ln -s /usr/lib/pulse-1.0 /usr/lib/pulse-1.0.0
</pre>

=== Pulseaudio Setup independant on a X-Server installation ===
==== Add Username to /etc/group ====
Make sure you add your username to the following system groups:
<ul>
<li>pulse
<li>pulse-access
<li>audio
</ul>

Use the following commands: ($USER stands for current logged in user)<br>
<pre>
sudo adduser $USER pulse
sudo adduser $USER pulse-access
sudo adduser $USER audio
</pre>

Example, for the user dl6kbg the grup file must contain:
<pre>
grep dl6kbg /etc/group
...
audio:x:29:pulse,dl6kbg
pulse:x:119:dl6kbg
pulse-access:x:120:dl6kbg
...
</pre>
==== Enable Pulseaudio Daemon to run in system wide mode ====
<pre>
sudo nano /etc/default/pulseaudio
</pre>

change settings to:

<pre>
PULSEAUDIO_SYSTEM_START=1
DISALLOW_MODULE_LOADING=0
</pre>
==== Enable network mode ====
<pre>
sudo nano /etc/pulse/system.pa
</pre>

and add:

<pre>
load-module module-native-protocol-tcp auth-anonymous=1
</pre>

Restart pulseaudio:
<pre>
sudo /etc/init.d/pulseaudio restart
</pre>

or restart the system and fire up the softrock server.
Pulseaudio runs now in systemwide mode and your softrock server should be able to establish a connection
to your following dspserver.

== Configure Pulseaudio Daemon ==

In order to use 96000 or 192000, you will need to configure pulse audio by editing:
<pre>
/etc/pulse/daemon.conf
</pre>

Uncomment these settings and change it for your needs.

Example:
<pre>
default-sample-format = s24le
default-sample-rate = 192000
</pre>

== Tweak System for realtime performance ==

For realtime audio add the following to:
<pre>
/etc/security/limits.conf
</pre>

<pre>
@audio - rtprio 99
@audio - memlock unlimited
</pre>
and reboot and enjoy your system.

ToDo/- Wishlist

2011-11-14T15:07:05Z

156.34.100.226:

*add support for Griffin Powermate Vfo Knob
*add configurable ports to dspserver and qtradio
*add user/password login to dspserver

Ghpsdr3 SDR project - User contributions [en]

Pulseaudio Setup

ToDo/- Wishlist