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diff --git a/doc/kioslave/audiocd.docbook b/doc/kioslave/audiocd.docbook new file mode 100644 index 00000000..982e1f23 --- /dev/null +++ b/doc/kioslave/audiocd.docbook @@ -0,0 +1,208 @@ +<article lang="&language;" id="audiocd"> +<title>audiocd</title> +<articleinfo> +<authorgroup> +<author>&Rik.Hemsley; &Rik.Hemsley.mail;</author> +<author><personname><firstname>Benjamin</firstname><surname>Meyer</surname></personname></author> +<!-- TRANS:ROLES_OF_TRANSLATORS --> +</authorgroup> + +<date>2004-09-16</date> +<releaseinfo>2.30.00</releaseinfo> + +</articleinfo> + +<para>Allows treating audio <acronym>CD</acronym>s like a +<quote>real</quote> filesystem, where tracks are represented as files +and, when copied from the folder, are digitally extracted from the +<acronym>CD</acronym>. This ensures a perfect copy of the audio +data.</para> + +<para>To see how this slave works, insert an audio <acronym>CD</acronym> +in your &CD-ROM; drive and type <userinput>audiocd:/</userinput> into +&konqueror;. Within a few seconds you should see a list of tracks and +some folders.</para> + +<para>Audio <acronym>CD</acronym>s don't really have folders, but +the audiocd slave provides them as a convenience. If you look inside +these folders you will see that they all contain the same number of +tracks. If you are connected to the Internet, some folders will have +the actual track titles shown as the filenames.</para> + +<para>The reason that these separate folders exist are so that you +can choose in which format you would like to listen to (or copy) the +tracks on the <acronym>CD</acronym>.</para> + +<para>If you drag a track from the <filename class="directory">Ogg +Vorbis</filename> folder and drop it on another &konqueror; window +open at your home folder, you should see a progress window showing +you that the track is being extracted from the <acronym>CD</acronym> and +saved to a file. Note that Ogg Vorbis is a compressed format, so the +file in your home folder will appear a great deal smaller than it +would have been if you had copied the raw data.</para> + +<para>The mechanism behind this is quite simple. When the audiocd slave +is asked to retrieve a track from the <filename class="directory">Ogg +Vorbis</filename> folder, it starts extracting the digital audio data +from the <acronym>CD</acronym>. As it sends the data over to the file in +your home folder, it simultaneously encodes it in Ogg Vorbis format +(<acronym>CD</acronym> audio is in an uncompressed format to start +with).</para> + +<para>You could also try dragging a file ending in <literal +role="extension">.wav</literal> and dropping it on the &kde; Media +Player, &noatun;. In this case, the procedure that happens behind the +scenes is similar, except that instead of encoding the audio data in Ogg +Vorbis format, it is put through a very simple conversion, from raw +binary data (which the <literal role="extension">.cda</literal> files in +the toplevel folder represent) to <quote>RIFF WAV</quote> format, a +non-compressed format that most media players understand.</para> + +<para>&noatun; should quite happily play the <literal +role="extension">.wav</literal> file, but if it has trouble, you may +consider using the <option>paranoia_level</option> option, explained +below.</para> + +<variablelist> +<title>Options</title> + +<varlistentry> +<term><option>device</option></term> +<listitem> +<para>Set the path to the audio <acronym>CD</acronym> device, ⪚ +<userinput>audiocd:/<option>?device</option>=<parameter>/dev/sdc</parameter></userinput>. +Normally, the slave will try to find a <acronym>CD</acronym> drive with +an audio <acronym>CD</acronym> inserted, but if it fails or you have +more than one <acronym>CD</acronym> drive, you may want to try this +option. Note that the configuration dialog allows you to set a default +value for this option.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term><option>fileNameTemplate</option></term> +<listitem> +<para>Set the file name template, ⪚ +<userinput>audiocd:/<option>?fileNameTemplate</option>=<parameter>Track %{number}</parameter></userinput>. Note that the configuration dialog allows you to set a default value for this option. A warning that if you set it to an empty string no files will show up.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term><option>albumNameTemplate</option></term> +<listitem> +<para>Set the album name template, ⪚ +<userinput>audiocd:/<option>?albumNameTemplate</option>=<parameter>%{albumartist} %{albumtitle}</parameter></userinput>. Note that the configuration dialog allows you to set a default value for this option.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term><option>niceLevel</option></term> +<listitem> +<para>Sets the process nice level for encoders, ⪚ +<userinput>audiocd:/<option>?albumNameTemplate</option>=<parameter>niceLevel=10</parameter></userinput>. Note that the configuration dialog allows you to set a default value for this option.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term><option>paranoia_level</option></term> +<listitem> +<para>Set the amount of error detection and correction used when +extracting data.</para> + +<variablelist> +<varlistentry> +<term>Level 0</term> +<listitem> +<para>No detection or correction. Only useful if you have a perfect +<acronym>CD</acronym> drive (unlikely).</para> +</listitem> +</varlistentry> + +<varlistentry> +<term>Level 1</term> +<listitem> +<para>Enable basic error checking and correction.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term>Level 2</term> +<listitem> +<para>Default. Specifies that only a perfect extraction will be +accepted.</para> +</listitem> +</varlistentry> +</variablelist> + +<para>Note that there is a disadvantage to level 2. Extraction can be +very slow, so real-time digital playback may not work properly. If you +have a good quality <acronym>CD</acronym> drive (note that more +expensive does not necessarily mean better quality) then you probably +won't experience very slow extraction, but a poor drive may take days +(!) to extract the audio from one <acronym>CD</acronym>.</para> +</listitem> +</varlistentry> + +<varlistentry> +<term><option>cddbChoice</option></term> +<listitem> + +<para>Specify which Internet <acronym>CD</acronym> Database entry to use. Audio +<acronym>CD</acronym>s don't have track names, but the Internet +<acronym>CD</acronym> Database is a clever system which uses a special +unique identifier generated from the number and length of tracks on each +<acronym>CD</acronym> to cross-reference a track listing. Track listings +are contributed by the Internet community and made available to +all. Occasionally there will be multiple entries. You can specify which one to use.</para> + +<para>You can submit your own track listings using &kscd;, the &kde; +<acronym>CD</acronym> player.</para> + +<para>By default audiocd tries to pick the best one.</para> +</listitem> +</varlistentry> +</variablelist> + +<variablelist> +<title>Examples</title> +<varlistentry> +<term><userinput>audiocd:/?device=/dev/scd0&paranoia_level=0&cddbChoice=0</userinput></term> +<listitem> +<para>Gives a listing of the tracks on the audio <acronym>CD</acronym> +inserted in <filename class="devicefile">/dev/scd0</filename>, which on +&Linux; specifies the first <acronym>SCSI</acronym> &CD-ROM; device. If +you copy tracks from the <acronym>CD</acronym>, digital extraction will +be performed without error correction or detection. The +<acronym>CDDB</acronym> Database entry 0 will be used.</para> +</listitem> +</varlistentry> +</variablelist> + +<qandaset> +<title>Frequently Asked Question</title> +<qandaentry> +<question> +<para>I get <errorname>The file or folder / does not +exist</errorname>. How do I fix that? I have an audio +<acronym>CD</acronym> in my drive!</para> +</question> + +<answer> +<para>Try running <userinput><command>cdparanoia</command> +<option>-vsQ</option></userinput> as yourself (not <systemitem +class="username">root</systemitem>). Do you see a track list? If not, +make sure you have permission to access the <acronym>CD</acronym> +device. If you're using <acronym>SCSI</acronym> emulation (possible if +you have an <acronym>IDE</acronym> <acronym>CD</acronym> writer) then +make sure you check that you have read and write permissions on the +generic <acronym>SCSI</acronym> device, which is probably <filename +class="devicefile">/dev/sg0</filename>, <filename +class="devicefile">/dev/sg1</filename>, &etc;. If it still doesn't work, +try typing <userinput>audiocd:/?device=/dev/sg0</userinput> (or similar) +to tell kio_audiocd which device your &CD-ROM; is.</para> +</answer> +</qandaentry> +</qandaset> + + +</article> |