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Printing system-level dir/tempo in condensed scores #3650

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craigsapp opened this issue Apr 19, 2024 · 2 comments
Open

Printing system-level dir/tempo in condensed scores #3650

craigsapp opened this issue Apr 19, 2024 · 2 comments
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feature request low priority waiting for MEI clarification

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@craigsapp
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Related to issue music-encoding/music-encoding#1450

It would be useful to implement dir@type="system" and tempo@type="system" to label dirs/tempos as "system level" text that should still be displayed if a staff has been condensed on a particular system that has dir/tempo that should still be displayed in the music.

Example:

Screenshot 2024-04-19 at 10 23 54 AM
Click to view MEI data for above example. 
<?xml version="1.0" encoding="UTF-8"?>
<?xml-model href="https://music-encoding.org/schema/5.0/mei-all.rng" type="application/xml" schematypens="http://relaxng.org/ns/structure/1.0"?>
<?xml-model href="https://music-encoding.org/schema/5.0/mei-all.rng" type="application/xml" schematypens="http://purl.oclc.org/dsdl/schematron"?>
<mei xmlns="http://www.music-encoding.org/ns/mei" meiversion="5.0">
 <meiHead>
  <fileDesc>
   <titleStmt>
    <title>Grave</title>
   </titleStmt>
   <pubStmt>
    <unpub>This MEI file was created by Verovio's Humdrum converter. When published, this unpub element should be removed, and the enclosing pubStmt element should be properly filled out.</unpub>
   </pubStmt>
  </fileDesc>
  <encodingDesc>
   <appInfo>
    <application isodate="2024-04-19T10:07:09" version="4.2.0-dev-3d89370-dirty">
     <name>Verovio</name>
     <p>Transcoded from Humdrum</p>
    </application>
   </appInfo>
  </encodingDesc>
  <workList>
   <work xml:id="work0_encoded" type="encoded">
    <title type="uniform">
     <titlePart type="movementName" analog="humdrum:OMD">Grave</titlePart>
    </title>
   </work>
  </workList>
  <extMeta>
   <frames xmlns="http://www.humdrum.org/ns/humxml">
    <metaFrame n="0" token="!!!OMD: Grave" xml:id="L1">
     <frameInfo>
      <startTime float="0" />
      <frameType>reference</frameType>
      <referenceKey>OMD</referenceKey>
      <referenceValue>Grave</referenceValue>
     </frameInfo>
    </metaFrame>
    <metaFrame n="23" token="!!!verovio: condense auto" xml:id="L24">
     <frameInfo>
      <startTime float="36" />
      <frameType>reference</frameType>
      <referenceKey>verovio</referenceKey>
      <referenceValue>condense auto</referenceValue>
     </frameInfo>
    </metaFrame>
    <metaFrame n="24" token="!!!system-decoration: [(s1,s2)][(s3,s4)]" xml:id="L25">
     <frameInfo>
      <startTime float="36" />
      <frameType>reference</frameType>
      <referenceKey>system-decoration</referenceKey>
      <referenceValue>[(s1,s2)][(s3,s4)]</referenceValue>
     </frameInfo>
    </metaFrame>
   </frames>
  </extMeta>
 </meiHead>
 <music decls="#work0_encoded">
  <body>
   <mdiv xml:id="m1iwncdw">
    <score xml:id="s1i9sp1d">
     <scoreDef xml:id="s1ohoddf" midi.bpm="40.000000">
      <staffGrp xml:id="s10tqruq" bar.thru="false">
       <staffGrp xml:id="s17z2eo8" bar.thru="true" symbol="bracket">
        <staffDef xml:id="staffdef-L2F4" n="1" lines="5">
         <clef xml:id="c1gi6ole" shape="G" line="2" />
        </staffDef>
        <staffDef xml:id="staffdef-L2F3" n="2" lines="5">
         <clef xml:id="c1ur6af8" shape="G" line="2" />
        </staffDef>
       </staffGrp>
       <staffGrp xml:id="s1alrp7w" bar.thru="true" symbol="bracket">
        <staffDef xml:id="staffdef-L2F2" n="3" lines="5">
         <clef xml:id="cx3p1gj" shape="F" line="4" />
        </staffDef>
        <staffDef xml:id="staffdef-L2F1" n="4" lines="5">
         <clef xml:id="cx9bqg2" shape="F" line="4" />
        </staffDef>
       </staffGrp>
      </staffGrp>
     </scoreDef>
     <section xml:id="section-L2F1">
      <measure xml:id="measure-L1">
       <staff xml:id="staff-L2F4" n="1">
        <layer xml:id="layer-L1F4N1" n="1">
         <note xml:id="note-L4F4" dur="1" oct="5" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L2F3" n="2">
        <layer xml:id="layer-L1F3N1" n="1">
         <note xml:id="note-L4F3" dur="1" oct="4" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L2F2" n="3">
        <layer xml:id="layer-L1F2N1" n="1">
         <note xml:id="note-L4F2" dur="1" oct="3" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L2F1" n="4">
        <layer xml:id="layer-L1F1N1" n="1">
         <note xml:id="note-L4F1" dur="1" oct="2" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <tempo xml:id="tempo-L1F1" type="system" staff="1 3" tstamp="1.000000">Grave</tempo>
      </measure>
      <measure xml:id="measure-L5">
       <staff xml:id="staff-L5F4N1" n="1">
        <layer xml:id="layer-L5F4N1" n="1">
         <note xml:id="note-L6F4" dur="1" oct="5" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L5F3N1" n="2">
        <layer xml:id="layer-L5F3N1" n="1">
         <note xml:id="note-L6F3" dur="1" oct="4" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L5F2N1" n="3">
        <layer xml:id="layer-L5F2N1" n="1">
         <note xml:id="note-L6F2" dur="1" oct="3" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L5F1N1" n="4">
        <layer xml:id="layer-L5F1N1" n="1">
         <note xml:id="note-L6F1" dur="1" oct="2" pname="c" accid.ges="n" />
        </layer>
       </staff>
      </measure>
      <measure xml:id="measure-L7">
       <staff xml:id="staff-L7F4N1" n="1">
        <layer xml:id="layer-L7F4N1" n="1">
         <note xml:id="note-L8F4" dur="1" oct="5" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L7F3N1" n="2">
        <layer xml:id="layer-L7F3N1" n="1">
         <note xml:id="note-L8F3" dur="1" oct="4" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L7F2N1" n="3">
        <layer xml:id="layer-L7F2N1" n="1">
         <note xml:id="note-L8F2" dur="1" oct="3" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L7F1N1" n="4">
        <layer xml:id="layer-L7F1N1" n="1">
         <note xml:id="note-L8F1" dur="1" oct="2" pname="c" accid.ges="n" />
        </layer>
       </staff>
      </measure>
      <measure xml:id="measure-L9" right="dbl">
       <staff xml:id="staff-L9F4N1" n="1">
        <layer xml:id="layer-L9F4N1" n="1">
         <rest xml:id="rest-L10F4" dur="1" />
        </layer>
       </staff>
       <staff xml:id="staff-L9F3N1" n="2">
        <layer xml:id="layer-L9F3N1" n="1">
         <note xml:id="note-L10F3" dur="1" oct="4" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L9F2N1" n="3">
        <layer xml:id="layer-L9F2N1" n="1">
         <note xml:id="note-L10F2" dur="1" oct="3" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L9F1N1" n="4">
        <layer xml:id="layer-L9F1N1" n="1">
         <note xml:id="note-L10F1" dur="1" oct="2" pname="c" accid.ges="n" />
        </layer>
       </staff>
      </measure>
      <measure xml:id="measure-L11">
       <staff xml:id="staff-L11F4N1" n="1">
        <layer xml:id="layer-L11F4N1" n="1">
         <rest xml:id="rest-L13F4" dur="1" />
        </layer>
       </staff>
       <staff xml:id="staff-L11F3N1" n="2">
        <layer xml:id="layer-L11F3N1" n="1">
         <note xml:id="note-L13F3" dur="1" oct="4" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L11F2N1" n="3">
        <layer xml:id="layer-L11F2N1" n="1">
         <note xml:id="note-L13F2" dur="1" oct="3" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L11F1N1" n="4">
        <layer xml:id="layer-L11F1N1" n="1">
         <note xml:id="note-L13F1" dur="1" oct="2" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <tempo xml:id="dir-L12F1" place="above" type="system" staff="1 3" tstamp="1.000000">
        Allegro
       </tempo>
      </measure>
      <measure xml:id="measure-L14">
       <staff xml:id="staff-L14F4N1" n="1">
        <layer xml:id="layer-L14F4N1" n="1">
         <rest xml:id="rest-L15F4" dur="1" />
        </layer>
       </staff>
       <staff xml:id="staff-L14F3N1" n="2">
        <layer xml:id="layer-L14F3N1" n="1">
         <note xml:id="note-L15F3" dur="1" oct="4" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L14F2N1" n="3">
        <layer xml:id="layer-L14F2N1" n="1">
         <note xml:id="note-L15F2" dur="1" oct="3" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L14F1N1" n="4">
        <layer xml:id="layer-L14F1N1" n="1">
         <note xml:id="note-L15F1" dur="1" oct="2" pname="c" accid.ges="n" />
        </layer>
       </staff>
      </measure>
      <measure xml:id="measure-L16">
       <staff xml:id="staff-L16F4N1" n="1">
        <layer xml:id="layer-L16F4N1" n="1">
         <rest xml:id="rest-L17F4" dur="1" />
        </layer>
       </staff>
       <staff xml:id="staff-L16F3N1" n="2">
        <layer xml:id="layer-L16F3N1" n="1">
         <note xml:id="note-L17F3" dur="1" oct="4" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L16F2N1" n="3">
        <layer xml:id="layer-L16F2N1" n="1">
         <note xml:id="note-L17F2" dur="1" oct="3" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L16F1N1" n="4">
        <layer xml:id="layer-L16F1N1" n="1">
         <note xml:id="note-L17F1" dur="1" oct="2" pname="c" accid.ges="n" />
        </layer>
       </staff>
      </measure>
      <measure xml:id="measure-L18">
       <staff xml:id="staff-L18F4N1" n="1">
        <layer xml:id="layer-L18F4N1" n="1">
         <rest xml:id="rest-L19F4" dur="1" />
        </layer>
       </staff>
       <staff xml:id="staff-L18F3N1" n="2">
        <layer xml:id="layer-L18F3N1" n="1">
         <note xml:id="note-L19F3" dur="1" oct="4" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L18F2N1" n="3">
        <layer xml:id="layer-L18F2N1" n="1">
         <note xml:id="note-L19F2" dur="1" oct="3" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L18F1N1" n="4">
        <layer xml:id="layer-L18F1N1" n="1">
         <note xml:id="note-L19F1" dur="1" oct="2" pname="c" accid.ges="n" />
        </layer>
       </staff>
      </measure>
      <measure xml:id="measure-L20" right="end">
       <staff xml:id="staff-L20F4N1" n="1">
        <layer xml:id="layer-L20F4N1" n="1">
         <rest xml:id="rest-L21F4" dur="1" />
        </layer>
       </staff>
       <staff xml:id="staff-L20F3N1" n="2">
        <layer xml:id="layer-L20F3N1" n="1">
         <note xml:id="note-L21F3" dur="1" oct="4" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L20F2N1" n="3">
        <layer xml:id="layer-L20F2N1" n="1">
         <note xml:id="note-L21F2" dur="1" oct="3" pname="c" accid.ges="n" />
        </layer>
       </staff>
       <staff xml:id="staff-L20F1N1" n="4">
        <layer xml:id="layer-L20F1N1" n="1">
         <note xml:id="note-L21F1" dur="1" oct="2" pname="c" accid.ges="n" />
        </layer>
       </staff>
      </measure>
     </section>
    </score>
   </mdiv>
  </body>
 </music>
</mei>

The two tempos would include @type="system":

<tempo xml:id="tempo-L1F1" type="system" staff="1 3" tstamp="1.000000">Grave</tempo>
<tempo xml:id="dir-L12F1" place="above" type="system" staff="1 3" tstamp="1.000000">Allegro</tempo>

When condensing a tempo or dir that contains a @type="system", then the staff assignments for the text would be adjusted automatically:

The basic algorithm for <dir type="system" staff="1 3"> when condensing would be to place the staff 1 text on staff 2 if staff 1 is condensed. If staff 1 and 2 are condensed, then there would be no extra text displayed on staff 3, since the system-level text is already displayed there. If only staff 3 is condensed, then staff 4 would be used for the text instead. If staff 1 and 3 are condensed, then the system-level text would be displayed on staff 2 and 4.
@lpugin
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lpugin commented Apr 19, 2024

The @type attribute is meant to remain free for application-specific uses. We need to find another solution

@craigsapp
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My suggestion on music-encoding/music-encoding#1450 is to use @func. There is currently no dir@func, but there is tempo@func.

@craigsapp craigsapp mentioned this issue Apr 20, 2024
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@lpugin @craigsapp