Difference between revisions of "Utilities"

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</pre>
 
</pre>
 
open pavucontrol and check if sox uses the right audio source. Select the following:
 
open pavucontrol and check if sox uses the right audio source. Select the following:
[[File:Pavucontrol.png|200px]]
+
 
if you are done. Press CRTL-C to quit the script and stop the recording. The script processess now the spectrum image from the just recorded wave-file:
+
[[File:Pavucontrol.png]]
 +
 
 +
if you are done with your recording, press CRTL-C to quit the script and stop the recording. The script processes the spectrum image from the just recorded wave-file:
 
<pre>
 
<pre>
 
Aborted.
 
Aborted.
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...done !
 
...done !
 
</pre>
 
</pre>
when you now have a look into your recording directory, it should look like this:
+
when you now have a look into your recording directory, you should have something like this:
 
<pre>
 
<pre>
 
-rw-rw-r-- 1 dl6kbg dl6kbg  207665 2012-04-05 20:41 201204052041_3756000.png
 
-rw-rw-r-- 1 dl6kbg dl6kbg  207665 2012-04-05 20:41 201204052041_3756000.png
 
-rw-rw-r-- 1 dl6kbg dl6kbg  32812 2012-04-05 20:41 201204052041_3756000.wav
 
-rw-rw-r-- 1 dl6kbg dl6kbg  32812 2012-04-05 20:41 201204052041_3756000.wav
 
</pre>
 
</pre>
 +
You now have a time and frequency stamped audio file and the spectrum view from that audio file.
 +
 
[[File:Sox_spec.png|200px]]
 
[[File:Sox_spec.png|200px]]
 +
 
===Frequency Scanning===
 
===Frequency Scanning===
 
===Gnome Predict===
 
===Gnome Predict===
 
===WSPR===
 
===WSPR===

Revision as of 15:53, 5 April 2012

So, now you have QtRadio running. Let's have some fun and do some useful things.

Squelch activated Recordings

Full featured recording script

sudo apt-get install sox
sudo apt-get install hamlib-utils
##!/bin/bash
QRG="_$(exec rigctl -m2 -r 127.0.0.1:19090 f 2>&1)"
NAME=`date +%Y%m%d%H%M`
rec -r 8000 -c 1 $NAME$QRG.wav
echo "processing spectrogram..."
sox $NAME$QRG.wav -n spectrogram -x 1280 -y 720 -z 100 -t "$NAME$QRG.wav" -c '' -o $NAME$QRG.png
echo "...done !"
nano /usr/local/bin/qtradio_rec
mkdir QtRadio_Recordings
cd QtRadio_Recordings

Fire up QtRadio before starting the recording-script.

qtradio_rec

you should now see this output from sox:

dl6kbg@ubuntu:~$ qtradio_rec 

Input File     : 'default' (alsa)
Channels       : 1
Sample Rate    : 8000
Precision      : 16-bit
Sample Encoding: 16-bit Signed Integer PCM

In:0.00% 00:00:21.50 [00:00:00.00] Out:164k  [      |      ]        Clip:0

open pavucontrol and check if sox uses the right audio source. Select the following:

Pavucontrol.png

if you are done with your recording, press CRTL-C to quit the script and stop the recording. The script processes the spectrum image from the just recorded wave-file:

Aborted.
processing spectrogram...
...done !

when you now have a look into your recording directory, you should have something like this:

-rw-rw-r-- 1 dl6kbg dl6kbg  207665 2012-04-05 20:41 201204052041_3756000.png
-rw-rw-r-- 1 dl6kbg dl6kbg   32812 2012-04-05 20:41 201204052041_3756000.wav

You now have a time and frequency stamped audio file and the spectrum view from that audio file.

Sox spec.png

Frequency Scanning

Gnome Predict

WSPR