The number of apparent playback channels can differ from the number of physical channels of the recording medium, i.e., 2-track monophonic recordings. In this example, the trackConfig element should record the fact that there are two physical tracks on the sound medium, while the soundChan element should be used to state that there is a single output channel. This element may be mapped to MARC field 344 subfield e or subfield f as appropriate.
                                 <elementSpec ident="trackConfig" module="MEI.header">
                                    
                                    <gloss xml:lang="en">track configuration</gloss>
                                    
                                    <desc xml:lang="en">Number of physical/input tracks on a sound medium (
                                       <abbr>e.g.</abbr>, eight
                                       track, twelve track).</desc>
                                    
                                    <classes>
                                       
                                       <memberOf key="att.common"/>
                                       
                                       <memberOf key="att.authorized"/>
                                       
                                       <memberOf key="att.bibl"/>
                                       
                                       <memberOf key="att.lang"/>
                                       
                                       <memberOf key="model.physDescPart"/>
                                       </classes>
                                    
                                    
                                    
                                    <attList>
                                       
                                       <attDef ident="num" usage="opt">
                                          
                                          <desc xml:lang="en">Records the track configuration in numeric form.</desc>
                                          
                                          <datatype>
                                             
                                             <rng:data type="positiveInteger"/>
                                             </datatype>
                                          </attDef>
                                       </attList>
                                    
                                    <remarks xml:lang="en">
                                       
                                       <p>The number of apparent playback channels can differ from the number of physical channels
                                          of
                                          the recording medium, 
                                          <abbr>i.e.</abbr>, 2-track monophonic recordings. In this example, the trackConfig
                                          element should record the fact that there are two physical tracks on the sound medium,
                                          while
                                          the <gi scheme="MEI">soundChan</gi> element should be used to state that there is a single
                                          output channel. This element may be mapped to 
                                          <abbr>MARC</abbr> field 344 subfield e or subfield f as
                                          appropriate.</p>
                                       </remarks>
                                    </elementSpec>