The first thing you must do is make sure you have the applications installed on your machine. One reader pointed out that gtkpod had trouble with XMMS (which, I admit, is an old-school application). With modern distributions XMMS is not typically installed, yet gtkpod still defaults to XMMS being the default player on some distributions (Ubuntu and Mandriva for example). We’ll fix that.

Let’s first show how to get gtkpod running with a command line player. We’ll use mpg123 because it’s one of the more universal players. You can install mpg123 either from command line or from the Add/Remove Software utility. From the command line the installation would be something like:

apt-get install mpg123

or

yum install mpg123

One mpg123 is installed you can then fire up gtkpod for configuration.

From the Edit menu select Preferences to open up the configuration window.

Gtkpod Preferences Window

There are two lines to configure:

Command for ‘Play now’

Command for ‘Enqueue’

Both of these can be configured with the command. As you can see, in the figure above, my Fedora 10 default installation of gtkpod defaults to using XDG. This is an outstanding GUI application for use with gtkpod. But let’s make a simple change. Edit that line to read:

mpg123 %s

and click OK. Now go back to gtkpod, right click on a song and select “Play Now”. The selected song should start playing. Now here’s one issue with using a command line tool for playback: In order to stop playback you have to open a terminal window and issue the killall command. In our example you would issue the command killall -9 mpg123. Or you could wait for the song to complete. If you queue a number of songs for playback then you will definitetly have to issue the killall command to stop playback.

The same configuration holds true for an external GUI application. The good news about using a GUI application is that you can control the playback of the file much better.

Should you want to use XMMS for the playback of files you will most likely either have to delete the current XMMS (if you do not have mp3 support rolled into your current XMMS installation.) Say you are using Fedora. To change XMMS for mp3 support issue the following commands (as root):

rpm -e xmms (Only if XMMS is already installed)

yum install xmms-mp3

Now if you use XMMS as your playback application you would have xmms %s for your playback configuration.

Final Thoughts

Yes it’s true, it would be nice if gtkpod had a built in player. However, having a reliable application for syncing an overly-flaky, yet overwhelmingly popular music device far outweighs having to configure the application to use a working playback system.

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The first thing to do is to get mpg123 installed. This can be done very quickly via command line. One of the following commands will do the trick (depending upon which distribution you use):

apt-get install mpg123

urpmi mpg123

If you are using Fedora Core you will most likely have to stop by rpm.pbone.net, download the correct rpm package and install with the command:

rpm -ivh mpg123-RELEASE_NUMBER.rpm

Where RELEASE_NUMBER is the actual release number you download.

Once installed you are ready to go.

With the wav files located in a directory change to that directory to run the command. The format of the command will be:

mpg123 -w file.wav file.mp3

The “-w” argument tells mpg123 that the output will be in the .wav format. The first file name is the output file name which is user configurable. A word of warning, spaces in file names aren’t always the best choice in the Linux operating system. If you want to separate words in a file name you can use “_” character. So creating a .wav of Rush’s Tom Sawyer you would do something like:

mpg123 -w Rush_Tom_Sawyer.wav “01 – Tom Sawyer.mp3″

Batch Conversion

What about batch conversion? This requires a bit of shell scripting. Create a Music directory (in modern Linux distributions there should be one in ~/) and dump all of your mp3 files into that directory. Next, create a shell script in your favorite text editor. We’ll call that script “batch_conversion”. The contents of the script might look like:

#!/usr/bin/perl
my $dir = “~/Music”;
opendir DH, $dir or die “Can’t open $dir: $!”;
$count2=1;
while ($name = readdir DH) {
next unless $name =~ /\.mp3$/;
$wav=”$count2.wav”;
print “$wav\n”;
system “mpg123 -w $wav \”$name\”";
$count2++;
}

Once you save the file you have to give it executable permissions with the command chmod u+x batch_conversion. To run the command you will issue (from the directory the new file is located) ./batch_conversion. Once you run the file you will have both the mp3 and the wav files located in the ~/Music directory.

Final Thoughts

Converting mp3 files to wav files for burning audio CDs is a simple process with mpg123. There are gui tools for this job but the command line tools make for much more flexible jobs.

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