<assess> and <player>
A women's choral part is set up so that on three-way splits, first sopranos should sing the top note, second sopranos should sing the middle note, and all altos should sing the bottom note. A listening application can then see if the pitch is correct based on which player is selected.
<score-partwise version="4.0">
<part-list>
<score-part id="P1">
<part-name>Soprano Alto</part-name>
<part-name-display>
<display-text xml:space="preserve">Soprano
Alto</display-text>
</part-name-display>
<score-instrument id="P1-I1">
<instrument-name>ARIA Player</instrument-name>
<instrument-sound>voice.soprano</instrument-sound>
</score-instrument>
<score-instrument id="P1-I2">
<instrument-name>ARIA Player</instrument-name>
<instrument-sound>voice.alto</instrument-sound>
</score-instrument>
<player id="P1-M1">
<player-name>Soprano 1</player-name>
</player>
<player id="P1-M2">
<player-name>Soprano 2</player-name>
</player>
<player id="P1-M3">
<player-name>Alto 1</player-name>
</player>
<player id="P1-M4">
<player-name>Alto 2</player-name>
</player>
</score-part>
</part-list>
<part id="P1">
<measure number="1" width="191">
<attributes>
<divisions>2</divisions>
<key>
<fifths>0</fifths>
<mode>minor</mode>
</key>
<time>
<beats>4</beats>
<beat-type>4</beat-type>
</time>
<clef>
<sign>G</sign>
<line>2</line>
</clef>
</attributes>
<note default-x="83">
<pitch>
<step>A</step>
<octave>4</octave>
</pitch>
<duration>8</duration>
<instrument id="P1-I2"/>
<voice>1</voice>
<type>whole</type>
<lyric default-y="-62" justify="left" number="1">
<syllabic>single</syllabic>
<text>Ah</text>
<extend type="start"/>
</lyric>
<listen>
<assess type="no" player="P1-M1"/>
<assess type="no" player="P1-M2"/>
</listen>
</note>
<note default-x="83">
<chord/>
<pitch>
<step>C</step>
<octave>5</octave>
</pitch>
<duration>8</duration>
<instrument id="P1-I1"/>
<voice>1</voice>
<type>whole</type>
<listen>
<assess type="no" player="P1-M3"/>
<assess type="no" player="P1-M4"/>
</listen>
</note>
</measure>
<measure number="2" width="120">
<note default-x="13">
<pitch>
<step>A</step>
<octave>4</octave>
</pitch>
<duration>8</duration>
<instrument id="P1-I2"/>
<voice>1</voice>
<type>whole</type>
<lyric number="1">
<extend type="stop"/>
</lyric>
<listen>
<assess type="no" player="P1-M1"/>
<assess type="no" player="P1-M2"/>
</listen>
</note>
<note default-x="13">
<chord/>
<pitch>
<step>C</step>
<octave>5</octave>
</pitch>
<duration>8</duration>
<instrument id="P1-I1"/>
<voice>1</voice>
<type>whole</type>
<listen>
<assess type="no" player="P1-M1"/>
<assess type="no" player="P1-M3"/>
<assess type="no" player="P1-M4"/>
</listen>
</note>
<note default-x="13">
<chord/>
<pitch>
<step>E</step>
<octave>5</octave>
</pitch>
<duration>8</duration>
<instrument id="P1-I1"/>
<voice>1</voice>
<type>whole</type>
<listen>
<assess type="no" player="P1-M2"/>
<assess type="no" player="P1-M3"/>
<assess type="no" player="P1-M4"/>
</listen>
</note>
</measure>
</part>
</score-partwise>