manual/include/midi-track-controls.html

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<p>A typical <dfn>MIDI track header</dfn> looks like this:</p>
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<figure>
<img src="/images/typical-midi-track-controls.png" alt="A MIDI track header">
<figcaption>
A MIDI track header
</figcaption>
</figure>
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<p>
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To show the full set of MIDI track controls, the <a href="@@track-height">track height</a>
must be increased beyond the default. MIDI tracks show only a few of the control elements
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when there is insufficient vertical space.
</p>
<p>
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A MIDI track has the same basic controls as an <a href="@@audio-track-controls">audio track</a>,
with the addition of three extra elements:
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</p>
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<ol>
<li>Some meters for the track's outputs (MIDI in <span style="color:red;">red</span>,
Audio in <span style="color:green;">green</span>)</li>
<li>The <dfn>Scroomer</dfn>, a zoom and scroll controller for the midi notes range</li>
<li>When the track is tall enough, the External MIDI Device selection dropdown appears.</li>
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</ol>
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<p>
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The Scroomer performs a couple of functions:
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</p>
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<ul>
<li>The scrollbar controls the range of pitches that are visible on the
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track, as visualized by the piano keyboard. Dragging the body of the scrollbar up
and down displays higher or lower pitches.</li>
<li>Dragging the scrollbar handles zooms in and out and increases or decreases the
range of visible pitches.</li>
<li>Double clicking the scrollbar auto-adjusts the zooms to make the range of
visible pitches fit the actual content of the track.</li>
<li>Clicking on the piano plays the corresponding MIDI note for reference.</li>
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</ul>
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<p>
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A MIDI track's data may span any number of the 16 available MIDI channels, and sometimes it is
useful to view only a subset of those channels; different instruments may,
for example, be put on different channels. In the context menu (<kbd class="mouse">right</kbd> click),
the <kbd class="menu">Channel Selector</kbd> allows to control the <dfn>MIDI channel</dfn>(s)
that will be visible in the editor.
</p>
<p>
To edit the contents of a MIDI track see <a href="@@edit-midi">MIDI Editing</a>.
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</p>