manual/include/midi-scene-automation.html
2017-11-15 15:34:10 +01:00

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<p>
Ardour is capable of being used to both record and deliver MIDI "scene"
automation. These are MIDI messages typically used to switch presets or
"scenes" on a variety of external equipment (or software), including lighting
and other audio/video tools. A common use case is to automatically change
presets between songs or to change lighting conditions based on a specific
position on the timeline.
</p>
<p>
Each change from one scene to another is represented by a marker in
the "Marker" bar.
</p>
<p>
Technically, scene changes are delivered as a combination of bank and
program change MIDI messages. MIDI allows for 16384 banks, each with
128 programs.
</p>
<h2>Recording Scene Changes</h2>
<p>
Ardour has a dedicated MIDI port named "Scene In". Recording scene changes can
be done by connecting this port to whatever source(s) of MIDI scene (bank/program
change) messages should be recorded.
</p>
<p>
Whenever the global record enable button is engaged and Ardour's
transport is rolling, a new marker will be created for each scene
change message received via the "Scene In" port.
</p>
<p>
If two different scene changes are received within a certain time
period, only the later one will be recorded as a new marker. The
default threshold for this is 1 millisecond.
</p>
<p>
If a scene change message is received while the playhead is close to
an existing marker with an associated scene change, the recording
process will alter the scene change in the existing marker rather than
adding a new one. The default threshold for this "proximity" test is 1
millisecond.
</p>
<h2>Manually Creating Scene Changes</h2>
<p>
This feature is not currently implemented.
</p>
<h2>Playing back Scene Changes</h2>
<p>
Ardour has a dedicated MIDI port named "Scene Out". Playing back scene
changes can be done by connecting this port to whatever target(s) of MIDI
scene (bank/program change) messages should be sent to.
</p>
<p>
When the global record enable button is <em>not</em> enabled, the relevant
message(s) will be sent via the "Scene Out" port as the playhead rolls past
each marker with a scene change associated with it.
</p>
<h2>Editing Scene Changes</h2>
<p>
This feature is not currently implemented.
</p>
<h2>Disabling Scene Changes</h2>
<p>
This feature is not currently implemented.
</p>