I have this minimum working example generated with denemo. As you may see, there are two staff with two voices each.
Now I want to merge the note stems in each staff and I don't find how to do it. The result should look like this:
My denemo file:
<?xml version="1.0" encoding="UTF-8"?>
<score xmlns="http://denemo.org/xmlns/Denemo" version="8">
<thumbnail>
<first-staff>1</first-staff>
<last-staff>3</last-staff>
<first-measure>1</first-measure>
<last-measure>3</last-measure>
<first-obj>0</first-obj>
<last-obj>2147483647</last-obj>
</thumbnail>
<lilycontrol>
<papersize>a4</papersize>
<lilyversion>2.22</lilyversion>
<fontsize>18</fontsize>
<orientation>1</orientation>
<total-edit-time>8421</total-edit-time>
<score-directives>
<directive>
<tag>ScoreIndent</tag>
<prefix>\layout {indent = 0.0}
</prefix>
<display>indent=0.0</display>
<data>0.0</data>
<override>4</override>
</directive>
</score-directives>
</lilycontrol>
<movement-number>1</movement-number>
<movement>
<edit-info>
<staffno>1</staffno>
<measureno>1</measureno>
<cursorposition>1</cursorposition>
<tonalcenter>0</tonalcenter>
<zoom>100</zoom>
<system-height>97</system-height>
<page-zoom>50</page-zoom>
<page-system-height>25</page-system-height>
<page-width>1846</page-width>
<page-height>1016</page-height>
<measure-width>150</measure-width>
</edit-info>
<score-info>
<tempo>
<duration>
<numerator>1</numerator>
<denominator>4</denominator>
</duration>
<bpm>120</bpm>
</tempo>
</score-info>
<staves>
<staff id="id0"></staff>
<staff id="id1"></staff>
</staves>
<voices>
<voice id="id2">
<voice-info>
<voice-name>Part 1</voice-name>
<first-measure-number>1</first-measure-number>
</voice-info>
<initial-voice-params>
<staff-ref staff="id0"></staff-ref>
<clef name="treble"></clef>
<key-signature>
<modal-key-signature note-name="D" mode="minor"></modal-key-signature>
</key-signature>
<time-signature>
<simple-time-signature>
<numerator>3</numerator>
<denominator>4</denominator>
</simple-time-signature>
</time-signature>
</initial-voice-params>
<voice-props>
<number-of-lines>5</number-of-lines>
<voice-control>1</voice-control>
<transpose>0</transpose>
<instrument></instrument>
<device-port>NONE</device-port>
<volume>127</volume>
<override_volume>0</override_volume>
<mute>0</mute>
<midi_prognum>0</midi_prognum>
<midi_channel>0</midi_channel>
<hasfigures>0</hasfigures>
<hasfakechords>0</hasfakechords>
<verses>
<verse>Nimm al -- les von mir, was mich fern -- hält von dir. Gib al -- les mir, was mich hin -- führt zu dir. Le -- ben -- di -- ger Gott, nimm mich mir und gib mich ganz __ zu ei -- gen dir. Nimm</verse>
</verses>
</voice-props>
<measures>
<measure>
<chord show="true" id="id3">
<duration base="quarter"></duration>
<notes>
<note id="id4">
<middle-c-offset>3</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id5">
<duration base="quarter"></duration>
<notes>
<note id="id6">
<middle-c-offset>3</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id7">
<duration base="quarter"></duration>
<notes>
<note id="id8">
<middle-c-offset>4</middle-c-offset>
</note>
</notes>
</chord>
</measure>
<measure>
<chord show="true" id="id9">
<duration base="half"></duration>
<notes>
<note id="id10">
<middle-c-offset>5</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id11">
<duration base="eighth"></duration>
<directives>
<directive>
<tag>Beam</tag>
<postfix>[</postfix>
<display>[</display>
<tx>6</tx>
</directive>
</directives>
<notes>
<note id="id12">
<middle-c-offset>5</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id13">
<duration base="eighth"></duration>
<directives>
<directive>
<tag>Beam</tag>
<postfix>]</postfix>
<display>]</display>
<tx>6</tx>
</directive>
</directives>
<notes>
<note id="id14">
<middle-c-offset>4</middle-c-offset>
</note>
</notes>
</chord>
</measure>
</measures>
</voice>
<voice id="id15">
<voice-info>
<voice-name>Part 1</voice-name>
<first-measure-number>1</first-measure-number>
</voice-info>
<initial-voice-params>
<staff-ref staff="id0"></staff-ref>
<clef name="treble"></clef>
<key-signature>
<modal-key-signature note-name="D" mode="minor"></modal-key-signature>
</key-signature>
<time-signature>
<simple-time-signature>
<numerator>3</numerator>
<denominator>4</denominator>
</simple-time-signature>
</time-signature>
</initial-voice-params>
<voice-props>
<number-of-lines>5</number-of-lines>
<voice-control>3</voice-control>
<transpose>0</transpose>
<instrument></instrument>
<device-port>NONE</device-port>
<volume>127</volume>
<override_volume>0</override_volume>
<mute>0</mute>
<midi_prognum>0</midi_prognum>
<midi_channel>0</midi_channel>
<hasfigures>0</hasfigures>
<hasfakechords>0</hasfakechords>
</voice-props>
<measures>
<measure>
<chord show="true" id="id16">
<duration base="quarter"></duration>
<notes>
<note id="id17">
<middle-c-offset>1</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id18">
<duration base="quarter"></duration>
<notes>
<note id="id19">
<middle-c-offset>1</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id20">
<duration base="quarter"></duration>
<notes>
<note id="id21">
<middle-c-offset>2</middle-c-offset>
</note>
</notes>
</chord>
</measure>
<measure>
<chord show="true" id="id22">
<duration base="half"></duration>
<notes>
<note id="id23">
<middle-c-offset>3</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id24">
<duration base="eighth"></duration>
<directives>
<directive>
<tag>Beam</tag>
<postfix>[</postfix>
<display>[</display>
<tx>6</tx>
</directive>
</directives>
<notes>
<note id="id25">
<middle-c-offset>2</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id26">
<duration base="eighth"></duration>
<directives>
<directive>
<tag>Beam</tag>
<postfix>]</postfix>
<display>]</display>
<tx>6</tx>
</directive>
</directives>
<notes>
<note id="id27">
<middle-c-offset>2</middle-c-offset>
</note>
</notes>
</chord>
</measure>
</measures>
</voice>
<voice id="id28">
<voice-info>
<voice-name>unnamed</voice-name>
<first-measure-number>1</first-measure-number>
</voice-info>
<initial-voice-params>
<staff-ref staff="id1"></staff-ref>
<clef name="bass"></clef>
<key-signature>
<modal-key-signature note-name="D" mode="minor"></modal-key-signature>
</key-signature>
<time-signature>
<simple-time-signature>
<numerator>3</numerator>
<denominator>4</denominator>
</simple-time-signature>
</time-signature>
</initial-voice-params>
<voice-props>
<number-of-lines>5</number-of-lines>
<voice-control>1</voice-control>
<transpose>0</transpose>
<instrument></instrument>
<device-port>NONE</device-port>
<volume>127</volume>
<override_volume>0</override_volume>
<mute>0</mute>
<midi_prognum>0</midi_prognum>
<midi_channel>1</midi_channel>
<hasfigures>0</hasfigures>
<hasfakechords>0</hasfakechords>
<staff-directives>
<directive>
<tag>InstrumentName</tag>
<prefix>instrumentName = \markup { \with-url #'"scheme:(d-GoToPosition 1 2 1 1)(let ((choice (d-PopupMenu (list (cons (_ \"Change Name\") d-InstrumentName) (cons (_ \"Change Indent\") d-ScoreIndent)))))
(if choice (choice))) " "" }</prefix>
<override>22</override>
</directive>
</staff-directives>
<voice-directives>
<directive>
<tag>InitialVoice</tag>
<postfix>\voiceFour</postfix>
<display>Voice Four</display>
<override>4</override>
</directive>
</voice-directives>
</voice-props>
<measures>
<measure>
<chord show="true" id="id29">
<duration base="quarter"></duration>
<notes>
<note id="id30">
<middle-c-offset>-2</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id31">
<duration base="quarter"></duration>
<notes>
<note id="id32">
<middle-c-offset>-2</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id33">
<duration base="quarter"></duration>
<notes>
<note id="id34">
<middle-c-offset>0</middle-c-offset>
</note>
</notes>
</chord>
</measure>
<measure>
<chord show="true" id="id35">
<duration base="half"></duration>
<notes>
<note id="id36">
<middle-c-offset>0</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id37">
<duration base="eighth"></duration>
<notes>
<note id="id38">
<middle-c-offset>0</middle-c-offset>
<accidental name="sharp" show="true"></accidental>
</note>
</notes>
</chord>
<chord show="true" id="id39">
<duration base="eighth"></duration>
<notes>
<note id="id40">
<middle-c-offset>0</middle-c-offset>
<accidental name="sharp" show="false"></accidental>
</note>
</notes>
</chord>
</measure>
</measures>
</voice>
<voice id="id41">
<voice-info>
<voice-name>unnamed</voice-name>
<first-measure-number>1</first-measure-number>
</voice-info>
<initial-voice-params>
<staff-ref staff="id1"></staff-ref>
<clef name="bass"></clef>
<key-signature>
<modal-key-signature note-name="D" mode="minor"></modal-key-signature>
</key-signature>
<time-signature>
<simple-time-signature>
<numerator>3</numerator>
<denominator>4</denominator>
</simple-time-signature>
</time-signature>
</initial-voice-params>
<voice-props>
<number-of-lines>5</number-of-lines>
<voice-control>3</voice-control>
<transpose>0</transpose>
<instrument></instrument>
<device-port>NONE</device-port>
<volume>127</volume>
<override_volume>0</override_volume>
<mute>0</mute>
<midi_prognum>0</midi_prognum>
<midi_channel>1</midi_channel>
<hasfigures>0</hasfigures>
<hasfakechords>0</hasfakechords>
</voice-props>
<measures>
<measure>
<chord show="true" id="id42">
<duration base="quarter"></duration>
<notes>
<note id="id43">
<middle-c-offset>-6</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id44">
<duration base="quarter"></duration>
<notes>
<note id="id45">
<middle-c-offset>-6</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id46">
<duration base="quarter"></duration>
<notes>
<note id="id47">
<middle-c-offset>-7</middle-c-offset>
</note>
</notes>
</chord>
</measure>
<measure>
<chord show="true" id="id48">
<duration base="half"></duration>
<notes>
<note id="id49">
<middle-c-offset>-4</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id50">
<duration base="eighth"></duration>
<notes>
<note id="id51">
<middle-c-offset>-9</middle-c-offset>
</note>
</notes>
</chord>
<chord show="true" id="id52">
<duration base="eighth"></duration>
<notes>
<note id="id53">
<middle-c-offset>-9</middle-c-offset>
</note>
</notes>
</chord>
</measure>
</measures>
</voice>
</voices>
</movement>
</score>
I would appreciate any help. Since denemo has no own tag I used LilyPond.
Update 1
The command from rshann worked only if I run it on every voice. The result comes close, but on the seconds staff is still something wrong.
