OSC: add /scrub

[ardour-manual] / include / osc58-controlling-ardour-with-osc.html

<p>
  <abbr title="Open Sound Control"><dfn>OSC</dfn></abbr> lets synthesizers
  and other devices communicate with Ardour. OSC devices can send commands
  relating to playback (such as play or stop), performance (such as volume,
  play, stop, and almost any other function (such as Edit, or Undo).
</p>

<p class="note">
  <em>Note:</em> OSC control has changed dramatically since Ardour 4.7.
  The Path structure has been completely redone, Banking has been introduced,
  The controller is now able to tell Ardour what kind of feedback it can
  work with (including bank size) and two new math styles have been added
  to gain controls. If you are using an Ardour version of 4.7 or less,
  please read <a
  href="@@osc-control-for-ardour-4.7-and-prior">
  Osc control in ardour 4.7 and prior.</a>
</p>

<p>
  Ardour is probably one of the most OSC-controllable audio applications
  around, but as with all OSC-controllable apps, you can't do much without
  knowing what <dfn>messages</dfn> can be sent. This document describes the
  various categories of messages that Ardour understands. It is subject to
  change, particularly the "Actions" part below, since this relates to the
  GTK GUI for Ardour rather than the backend.
</p>

<h2>Connecting to Ardour via OSC</h2>
<p>
  OSC support is not enabled by default, but can be turned on via
  <kbd class="menu">Edit &gt; Preferences &gt; Control Surfaces</kbd>.
  Once enabled, Ardour will listen on port <code>3819</code> by default.
  This port number can be changed by editing <code>$ARDOUR_CONFIG</code>
  and adding this line within the <code>&lt;Config&gt;</code> section:
</p>
<kbd class="input">&lt;Option name="osc-port" value="<em>Your choice
here</em>"/&gt;</kbd>

<p>
  Ardour sends any feedback to the port and address that sent any
  feedback request. The port does not have to match Ardour's port. In
  fact it is better not to. This means that Ardour can deal with more
  than one controller at a time. The two controllers can bank
  independently and even use different math for faders. This could be
  used to allow talent to adjust their own monitor mix using a tablet
  or phone that can run an OSC controller. For a full explanation of
  how Ardour's feedback works please read <a
  href="@@osc58-feedback">
  OSC feedback In Ardour.</a>
</p>

<h2>Control Surface Set Up</h2>

<p>
  Control surface set up allows the controller to tell Ardour about it's
  capabilities. The surface can tell Ardour how many control strips it
  has for banking, if it is capable of setting it's faders or buttons
  to values set by Ardour's GUI or automation, What kind of math the
  faders use and more.
</p>
<p>
  Any time the <em>/set_surface</em> command is sent, the current bank
  is recalculated and if feedback is turned on, the values of each
  strip's controls are sent (or refreshed) as well. This will also
  refresh the Master feedback setup.
</p>
<p class="note">
  Surface Port Setting is available in the OSC GUI.
</p>
<p>
  As of Ardour 5.1, There is now a GUI setup in response to those using
  tablets with applications such as touchOSC or AndrOSC who need to be
  able to set a port for Ardour to send to. It can also change the
  default setting for set_surface. For more information about Ardour's
  OSC configuration GUI please read <a
  href="@@osc58-using-the-setup-dialog">
  Ardour's Setup Dialog.</a>
</p>
<p>If /set_surface is not sent, the default values are used:
  <ul>
          <li><em>Bank Size</em>: 0&mdash;No banking (or infinite bank size).</li>
          <li><em>Strip Types</em>: All strip types except hidden and special.</li>
          <li><em>Feedback</em>: 0&mdash;All off.</li>
          <li><em>Fader Mode</em>: 0&mdash;gain in dB (not relevant with feedback off)</li>
  </ul>
</p>
<p>
  These values give the same behaviour as prior versions of Ardour. (or the closest possible)
</p>
<table class="dl">
  <tr><th><kbd class="osc">/set_surface <em>bank_size</em> <em>strip_types</em>
  <em>feedback</em> <em>fadermode</em></kbd></th>
  <td>
          See below for an explanation of each parameter.
  </td></tr>
</table>
<h3>bank_size</h3>
<p>
  Bank Size is the number of channel strips the controller supports
  without banking. Setting this to 0 turns banking off by setting the
  bank size to infinite.
</p>
<p class="note">
        Bank size can also be set with <em>/set_surface/bank_size size.</em>
</p>
<h3>strip_types</h3>
<p>
  strip_types is an integer made up of bits. The easy way to
  deal with this is to think of strip_types items being worth a number and
  then adding all those numbers together for a value to send.
  Strip Types will determine what kind of strips will be included in
  bank. This would include: Audio, MIDI, busses, VCAs, Master, Monitor
  and hidden or selected strips.
</p>
<p>
  Aside from setting the track types for the main mix assignments, using
  /set_surface/strip_types with more than one surface button will allow
  switching between modes for example: inputs only, busses only,
  selected only, hidden only, by having the buttons send values of: 3,
  12, 256, 512. A full mix button might have a value 31.
</p>
<p>
  While Master and Monitor are listed as possibilities, most surfaces
  will not use them. Using /master and /monitor makes more sense.
  However, in the case where there are no master or monitor fader strips
  on the surface, it may be necessary to include them in the banked
  strips.
</p>
<p>Please see: <a
  href="@@osc58-feedback-and-strip-types-values">
  Calculating Feedback and Strip-types Values.</a>
</p>
<p class="note">
        Strip types can also be set with <em>/set_surface/strip_types types.</em>
</p>
<h3>feedback</h3>
<p>Feedback is an integer made up of bits. The easy way to
  deal with this is to think of feedback items being worth a number and
  then adding all those numbers together for a value to send.
</p>
<p>Please see: <a
  href="@@osc58-feedback-and-strip-types-values">
  Calculating Feedback and Strip-types Values.</a></p>
<p class="note">
        Feedback can also be set with <em>/set_surface/feedback feedback.</em>
</p>

<h3>gainmode</h3>
<p>
  Gainmode is a an int that acts as a bool:
  <ul>
          <li><em>0 (or false)</em> dB value as a float from -193 to +6. Sent as
          /strip/gain SSID value. (-193 or below are the same as -inf)</li>
          <li><em>1 (or true)</em> A positional fader based on the same math
          as Ardour's GUI.  An Float from 0 to 1. Sent as
          /strip/fader SSID value</li>
  </ul>
</p>
<p>
  Gainmode applies only to feedback values. The controller can choose
  which gain math to use by choosing to use the /*/gain or /*/fader path
  to send to Ardour. This makes sure a controller that doesn't set up
  Ardour's OSC can still use either math. The gainmode for feedback also
  determines the path Ardour uses for feedback so that the feedback
  messages match the control messages.
</p>
<p class="note">
        Gain mode can also be set with <em>/set_surface/gainmode gainmode.</em>
</p>

<h2>Querying Ardour for information</h2>
<p>
  The control Surface may wish to control the type a frequency of
  updates it receives. It can do this with querying commands. See: <a
  href="@@osc58-querying-ardour">
  Querying Ardour with OSC.</a>
</p>

<h2>List of OSC messages</h2>
<p class="note">
        Parameter types show how the value will be used. However, they may
        be sent as a different type if needed, see: <a
        href="@@osc58-parameter-types">
        Parameter Types in OSC.</a>
</p>
<h3>Master or Global messages</h3>

<h4>Transport Control</h4>
<table class="dl">
  <tr><th><kbd class="osc">/transport_stop</kbd></th>
  <td>Stops a rolling transport</td></tr>
  <tr><th><kbd class="osc">/transport_play</kbd></th>
  <td>Puts transport in play mode</td></tr>
  <tr><th><kbd class="osc">/toggle_roll</kbd></th>
  <td>Toggles between play and stop</td></tr>
  <tr><th><kbd class="osc">/stop_forget</kbd></th>
  <td>Stop transport and delete/forget last take</td></tr>
  <tr><th><kbd class="osc">/set_transport_speed <em>speed</em></kbd></th>
  <td>where <em>speed</em> is a float ranging from -8.0f to 8.0f</td></tr>
  <tr><th><kbd class="osc">/ffwd</kbd></th>
  <td>Adds 1.5 times to transport speed to maximum +8 times normal speed</td></tr>
  <tr><th><kbd class="osc">/rewind</kbd></th>
  <td>Adds -1.5 times to transport speed to maximum -8 times normal speed</td></tr>
  <tr><th><kbd class="osc">/goto_start</kbd></th>
  <td>Move playhead to start of session</td></tr>
  <tr><th><kbd class="osc">/goto_end</kbd></th>
  <td>Move playhead to end of session</td></tr>
  <tr><th><kbd class="osc">/jump_bars <em>bars</em></kbd></th>
  <td>Where <em>bars</em> is a float (+/-) of the number of bars to jump</td></tr>
  <tr><th><kbd class="osc">/jump_seconds <em>seconds</em></kbd></th>
  <td>Where <em>seconds</em> is a float (+/-) of the number of seconds to jump</td></tr>
  <tr><th><kbd class="osc">/toggle_click</kbd></th>
  <td>Toggle metronome click on and off</td></tr>
  <tr><th><kbd class="osc">/add_marker</kbd></th>
  <td>(adds marker to the current transport position)</td></tr>
  <tr><th><kbd class="osc">/remove_marker</kbd></th>
  <td>Removes marker at the current transport position (if there is one)</td></tr>
  <tr><th><kbd class="osc">/next_marker</kbd></th>
  <td>Move playhead to next marker</td></tr>
  <tr><th><kbd class="osc">/prev_marker</kbd></th>
  <td>Move playhead to previous marker</td></tr>
  <tr><th><kbd class="osc">/locate <em>spos</em> <em>roll</em></kbd></th>
  <td>where <em>spos</em> is the target position in samples and
  <em>roll</em> is a bool/integer defining whether you want transport
  to be kept rolling or not</td></tr>
  <tr><th><kbd class="osc">/loop_toggle</kbd></th>
  <td>Toggle loop mode on and off</td></tr>
  <tr><th><kbd class="osc">/loop_location <em>start</em> <em>end</em></kbd></th>
  <td><em>start</em> is the beginning of a loop and <em>end</em> is the
  end of a loop both are integer frame positions.</td></tr>
  <tr><th><kbd class="osc">/midi_panic</kbd></th>
  <td>Ardour will send an all notes off to all midi tracks</td></tr>
  <tr><th><kbd class="osc">/cancel_all_solos</kbd></th>
  <td>Cancel All Solos/PFLs/AFLs</td></tr>
</table>
<p>
  New for Ardour 5.9.
</p>
<table class="dl">
  <tr><th><kbd class="osc">/scrub <em>delta</em></kbd></th>
  <td>Where <em>delta</em> is a float indicating forward or reverse movement</td></tr>
</table>

<h4>Recording control</h4>
<table class="dl">
  <tr><th><kbd class="osc">/toggle_punch_in</kbd></th>
  <td></td></tr>
  <tr><th><kbd class="osc">/toggle_punch_out</kbd></th>
  <td></td></tr>
  <tr><th><kbd class="osc">/rec_enable_toggle</kbd></th>
  <td>Toggles master record enable</td></tr>
</table>

<h4>Transport Information</h4>
<table class="dl">
  <tr><th><kbd class="osc">/transport_frame</kbd></th>
  <td>Ardour sends /transport_frame <em>current_frame</em></td></tr>
  <tr><th><kbd class="osc">/transport_speed</kbd></th>
  <td>Ardour sends /transport_speed <em>speed</em></td></tr>
  <tr><th><kbd class="osc">/record_enabled</kbd></th>
  <td>Ardour sends /record_enabled <em>recordenable_status</em></td></tr>
</table>

<h4>Editing-related</h4>
<table class="dl">
  <tr><th><kbd class="osc">/undo</kbd></th>
  <td></td></tr>
  <tr><th><kbd class="osc">/redo</kbd></th>
  <td></td></tr>
  <tr><th><kbd class="osc">/save_state</kbd></th>
  <td>(this is the regular <kbd class="menu">Session &gt; Save</kbd>
  operation)</td></tr>
</table>

<h4>Master and Monitor strip control</h4>
<table class="dl">
  <tr><th><kbd class="osc">/master/gain <em>dB</em></kbd></th>
  <td>dB is a float indicating the desired gain in dB</td></tr>
  <tr><th><kbd class="osc">/master/fader  <em>position</em></kbd></th>
  <td>position is a float between 0 and 1 setting the desired position of the fader</td></tr>
  <tr><th><kbd class="osc">/master/trimdB <em>dB</em></kbd></th>
  <td>dB is a float from -20 to +20 representing the desired trim gain in dB</td></tr>
  <tr><th><kbd class="osc">/master/pan_stereo_position <em>position</em></kbd></th>
  <td>position is a float from 0 to 1 representing the desired pan position</td></tr>
  <tr><th><kbd class="osc">/master/mute  <em>state</em></kbd></th>
  <td>state is an int of o or 1 representing the desired mute state</td></tr>
  <tr><th><kbd class="osc">/monitor/gain <em>dB</em></kbd></th>
  <td>dB is a float indicating the desired gain in dB</td></tr>
  <tr><th><kbd class="osc">/monitor/fader  <em>position</em></kbd></th>
  <td>position is a float between 0 and 1 setting the desired position of the fader</td></tr>
  <tr><th><kbd class="osc">/monitor/mute  <em>state</em></kbd></th>
  <td>state is an int of 0 or 1 where 1 is muted</td></tr>
  <tr><th><kbd class="osc">/monitor/dim  <em>state</em></kbd></th>
  <td>state is an int of 0 or 1 where 1 is dimmed</td></tr>
  <tr><th><kbd class="osc">/monitor/mono  <em>state</em></kbd></th>
  <td>state is an int of 0 or 1 where 1 is mono mode</td></tr>
</table>

<h3>Track specific operations</h3>
<p>
  For each of the following, <em>ssid</em> is the Surface Strip ID for the track
</p>
<p class="note">
  SSID has a different meaning than RID in Ardour version 4.7 and before.
  Effectively, banking is always being used and the SSID is generated on
  the fly. The SSID is the position of the strip within bank as an int
  1 to bank size. There are no gaps as there have been in the past.
  Depending on the value of strip_types sent to Ardour, Master and
  Monitor, may be included in the list of SSIDs or not as set in
  <em>/set_surface</em>.
</p>
<p class="note">
  Some Surfaces (many Android applets) are not able to deal with more
  than one parameter in a command. However, the two parameter commands
  below can also be sent as /strip/command/ssid param. In this case the
  param should be a float even if an int is required below.
</p>
<table class="dl">
  <tr><th><kbd class="osc">/bank_up </kbd></th>
  <td>Change bank to the next higher bank.</td></tr>
  <tr><th><kbd class="osc">/bank_down </kbd></th>
  <td>Change bank to the next lower bank.</td></tr>
  <tr><th><kbd class="osc">/strip/mute <em>ssid</em> <em>mute_st</em></kbd></th>
  <td>where <em>mute_st</em> is a bool/int representing the desired mute state of the track</td></tr>
  <tr><th><kbd class="osc">/strip/solo <em>ssid</em> <em>solo_st</em></kbd></th>
  <td>where <em>solo_st</em> is a bool/int representing the desired solo state of the track</td></tr>
  <tr><th><kbd class="osc">/strip/solo_iso <em>ssid</em> <em>state</em></kbd></th>
  <td>where <em>state</em> is a bool/int representing the desired solo isolate state of the track</td></tr>
  <tr><th><kbd class="osc">/strip/solo_safe <em>ssid</em> <em>state</em></kbd></th>
  <td>where <em>state</em> is a bool/int representing the desired solo safe/lock state of the track</td></tr>
  <tr><th><kbd class="osc">/strip/monitor_input <em>ssid</em> <em>monitor_st</em></kbd></th>
  <td>where <em>monitor_st</em> is a bool/int where 1 is forced input monitoring.</td></tr>
  <tr><th><kbd class="osc">/strip/monitor_disk <em>ssid</em> <em>monitor_st</em></kbd></th>
  <td>where <em>monitor_st</em> is a bool/int where 1 is forced disk monitoring. When input and disk are both off,
  Auto monitoring is enabled.</td></tr>
  <tr><th><kbd class="osc">/strip/recenable <em>ssid</em> <em>rec_st</em></kbd></th>
  <td>where <em>rec_st</em> is a bool/int representing the desired rec state of the track</td></tr>
  <tr><th><kbd class="osc">/strip/record_safe <em>ssid</em> <em>rec_st</em></kbd></th>
  <td>where <em>rec_st</em> is a bool/int representing the desired record safe state of the track</td></tr>
  <tr><th><kbd class="osc">/strip/polarity <em>ssid</em> <em>invert</em></kbd></th>
  <td>where <em>invert</em> is a bool/int representing the desired polarity of the track</td></tr>
  <tr><th><kbd class="osc">/strip/gain <em>ssid</em>  <em>gain</em></kbd></th>
  <td>where <em>gain</em> is a float ranging from -193 to 6 representing the desired gain of the track in dB.</td></tr>
  <tr><th><kbd class="osc">/strip/fader <em>ssid</em>  <em>position</em></kbd></th>
  <td>where <em>position</em> is a float ranging from 0 to 1 representing the fader control position.</td></tr>
  <tr><th><kbd class="osc">/strip/trimdB <em>ssid</em>  <em>trim_db</em></kbd></th>
  <td>where <em>trim_db</em> is a float ranging from -20 to 20 representing the desired trim of the track in dB.</td></tr>
  <tr><th><kbd class="osc">/strip/pan_stereo_position <em>ssid</em> <em>position</em></kbd></th>
  <td>where <em>position</em> is a float ranging from 0 to 1 representing the desired pan position of the track</td></tr>
  <tr><th><kbd class="osc">/strip/pan_stereo_width <em>ssid</em> <em>width</em></kbd></th>
  <td>where <em>width</em> is a float ranging from 0 to 1 representing the desired pan width of the track</td></tr>
  <tr><th><kbd class="osc">/strip/send/gain <em>ssid</em> <em>sendid</em> <em>send_gain</em></kbd></th>
  <td>where <em>sendid</em> = nth_send, <em>send_gain</em> is a float
  ranging from -193 to +6 representing the desired gain in dB for the send</td></tr>
  <tr><th><kbd class="osc">/strip/send/fader <em>ssid</em> <em>sendid</em> <em>send_gain</em></kbd></th>
  <td>where <em>sendid</em> = nth_send, <em>send_gain</em> is a float
  ranging from 0 to 1 representing the desired position for the send as a fader</td></tr>
  <tr><th><kbd class="osc">/strip/send/enable <em>ssid</em> <em>sendid</em> <em>state</em></kbd></th>
  <td>where <em>sendid</em> = nth_send, <em>state</em> is 1 for enabled and 0 for disabled</td></tr>
  <tr><th><kbd class="osc">/strip/list </kbd></th>
  <td>see: <a href="@@osc58-querying-ardour">
  Querying Ardour with OSC.</a></td></tr>
  <tr><th><kbd class="osc">/strip/sends <em>ssid</em></kbd></th>
  <td>see: <a href="@@osc58-querying-ardour">
  Querying Ardour with OSC.</a></td></tr>
  <tr><th><kbd class="osc">/strip/receives <em>ssid</em></kbd></th>
  <td>see: <a href="@@osc58-querying-ardour">
  Querying Ardour with OSC.</a></td></tr>
  <tr><th><kbd class="osc">/strip/plugin/list <em>ssid</em></kbd></th>
  <td>see: <a href="@@osc58-querying-ardour">
  Querying Ardour with OSC.</a></td></tr>
  <tr><th><kbd class="osc">/strip/plugin/descriptor <em>ssid</em></kbd></th>
  <td>see: <a href="@@osc58-querying-ardour">
  Querying Ardour with OSC.</a></td></tr>
  <tr><th><kbd class="osc">/strip/plugin/reset <em>ssid</em> <em>piid</em> </kbd></th>
  <td>where <em>piid</em> = nth Plugin, will reset all values to the plugin's original values</td></tr>
  <tr><th><kbd class="osc">/strip/plugin/activate <em>ssid</em> <em>piid</em> </kbd></th>
  <td>where <em>piid</em> = nth Plugin, will set the plugin's state to active</td></tr>
  <tr><th><kbd class="osc">/strip/plugin/deactivate <em>ssid</em> <em>piid</em> </kbd></th>
  <td>where <em>piid</em> = nth Plugin, will set the plugin's state to inactive</td></tr>
  <tr><th><kbd class="osc">/strip/plugin/parameter <em>ssid</em> <em>piid</em> <em>param</em> <em>value</em></kbd></th>
  <td>where <em>piid</em> = nth Plugin, <em>param</em> = nth param, <em>value</em>
  is a float ranging from 0 to 1 representing the desired parameter value</td></tr>
  <tr><th><kbd class="osc">/strip/name <em>ssid</em> <em>name</em></kbd></th>
  <td>where <em>name</em> is a string for the desired name of the track</td></tr>
</table>
<h3>Selected Strip Operations</h3>
<p>
  New for Ardour 5, A whole set of operations that work on the selected
  or expanded strip.
</p>
<p class="note">
  Selected strip operations are complex enough for their own page.
  Please read: <a
  href="@@osc58-selection-and-expansion-considerations">
  Selection Considerations in OSC.</a> This is most important if more
  than one OSC surface is being used with Ardour.
</p>
<p>
  There are two kinds of selection in OSC. GUI selection and local
  expansion. By default expansion follows selection.
  <ul>
        <li>
                GUI selection: Use <em>/strip/select</em> to set.  Selecting
                a strip in the GUI will set OSC surface select and the surface
                will set GUI selection as well.
        </li>
        <li>
                Local expansion: Use <em>/strip/expand</em> to expand a strip
                without changing overall selection. When /strip/expand is set
                to 0 or false, the select channel will go back to using the
                strip selected by the GUI. While expand is turned on,
                selecting a strip on the GUI does not
                select the OSC strip. Sending a /strip/select message will
                override the expand as if it had been set to false.
                Good for more than one OSC controller at a time.
        </li>
  </ul>
</p>

<table class="dl">
  <tr><th><kbd class="osc">/strip/select <em>ssid</em> <em>y/n</em></kbd></th>
  <td>Where <em>y/n</em> = 1 for select. Sets both GUI select and strip
  to expanded mode. (0 is ignored)</td></tr>
  <tr><th><kbd class="osc">/strip/expand <em>ssid</em> <em>y/n</em></kbd></th>
  <td>Where <em>y/n</em> = 1 for expanded mode. Sets only local strip to
  Expanded. Setting to 0 resets the expansion to follow selection.</td></tr>
  <tr><th><kbd class="osc">/select/expand <em>y/n</em></kbd></th>
  <td>Where <em>y/n</em> = 1 for expanded mode, 0 for Select mode.</td></tr>
  <tr><th><kbd class="osc">/select/recenable <em>y/n</em></kbd></th>
  <td>Where <em>y/n</em> is 1 for enabled and 0 for disabled</td></tr>
  <tr><th><kbd class="osc">/select/record_safe <em>y/n</em></kbd></th>
  <td>Where <em>y/n</em> is 1 for safe and 0 for unlocked</td></tr>
  <tr><th><kbd class="osc">/select/mute <em>y/n</em></kbd></th>
  <td>Where <em>y/n</em> is 1 for enabled and 0 for disabled</td></tr>
  <tr><th><kbd class="osc">/select/solo <em>y/n</em></kbd></th>
  <td>Where <em>y/n</em> is 1 for enabled and 0 for disabled</td></tr>
  <tr><th><kbd class="osc">/select/solo_iso <em>state</em></kbd></th>
  <td>where <em>state</em> is a bool/int representing the desired solo isolate state of the track</td></tr>
  <tr><th><kbd class="osc">/select/solo_safe <em>state</em></kbd></th>
  <td>where <em>state</em> is a bool/int representing the desired solo safe/lock state of the track</td></tr>
  <tr><th><kbd class="osc">/select/monitor_input <em>y/n</em></kbd></th>
  <td>Where <em>y/n</em> is 1 for monitor from input and 0 for auto</td></tr>
  <tr><th><kbd class="osc">/select/monitor_disk <em>y/n</em></kbd></th>
  <td>Where <em>y/n</em> is 1 for monitor from disk and 0 for auto</td></tr>
  <tr><th><kbd class="osc">/select/polarity <em>invert</em></kbd></th>
  <td>where <em>invert</em> is a bool/int representing the desired polarity of the track</td></tr>
  <tr><th><kbd class="osc">/select/gain <em>gain</em></kbd></th>
  <td>Where <em>gain</em> is a float ranging from -193 to 6 representing the desired gain of the track in dB.</td></tr>
  <tr><th><kbd class="osc">/select/fader <em>position</em></kbd></th>
  <td>Where <em>position</em> is an float ranging from 0 to 1 representing the fader control position.</td></tr>
  <tr><th><kbd class="osc">/select/trimdB <em>trim_db</em></kbd></th>
  <td>where <em>trim_db</em> is a float ranging from -20 to 20 representing the desired trim of the track in dB.</td></tr>
  <tr><th><kbd class="osc">/select/pan_stereo_position <em>position</em></kbd></th>
  <td>where <em>position</em> is a float ranging from 0 to 1 representing the desired pan position of the track</td></tr>
  <tr><th><kbd class="osc">/select/pan_stereo_width <em>width</em></kbd></th>
  <td>where <em>width</em> is a float ranging from 0 to 1 representing the desired pan width of the track</td></tr>
  <tr><th><kbd class="osc">/select/pan_elevation_position <em>position</em></kbd></th>
  <td>where <em>position</em> is a float ranging from 0 to 1 representing the desired pan elevation of the track</td></tr>
  <tr><th><kbd class="osc">/select/pan_frontback_position <em>position</em></kbd></th>
  <td>where <em>position</em> is a float ranging from 0 to 1 representing the desired front to back position of the track</td></tr>
  <tr><th><kbd class="osc">/select/pan_lfe_control <em>value</em></kbd></th>
  <td>where <em>value</em> is a float ranging from 0 to 1 representing the desired LFE control value for the track</td></tr>
  <tr><th><kbd class="osc">/select/send_gain", <em>sendid</em> <em>send_gain</em></kbd></th>
  <td>where <em>sendid</em> = nth_send, <em>send_gain</em> is a float
  ranging from -193 to +6 representing the desired gain in dB for the send</td></tr>
  <tr><th><kbd class="osc">/select/send_fader", <em>sendid</em> <em>send_gain</em></kbd></th>
  <td>where <em>sendid</em> = nth_send, <em>send_gain</em> is a float
  ranging from 0 to 1 representing the desired position for the send as a fader</td></tr>
  <tr><th><kbd class="osc">/select/send_enable", <em>sendid</em> <em>state</em></kbd></th>
  <td>where <em>sendid</em> = nth_send, <em>state</em> is 1 for enabled and 0 for disabled</td></tr>
</table>

<h3>Menu actions</h3>
<p>
  Every single menu item in Ardour's GUI is accessible via OSC. There is
  a single common syntax to trigger the action as if it was selected
  with the mouse (or keyboard):</p>
<kbd class="osc">/access_action <em>action_name</em></kbd>
<p>
  As of Ardour 5.9, <em>access_action</em> can be inlined for control surfaces
  that are unable to send string parameters. The <em>action_name</em> is composed of
  a group and an action in the form of <em>Group/action</em> which fits very well
  as an OSC path extension:
</p>
<kbd class="osc">/access_action/<em>Group/action</em> <em>key_pressed</em></kbd>
<p>
  The key_pressed is optional, but if present is a float 1 or 0 where the
  command is ignored if key_pressed is  0.
</p>
<p class="note">
  Some of the Menu Actions duplicate other OSC commands. In all cases it is better
  to use the OSC commands rather than the Menu Actions if possible as the OSC commands
  are more direct.
</p>
<p>
  The <a href="@@list-of-menu-actions"> list of actions</a>
  shows all available values of <em>action-name</em> for Ardour.
</p>

<!--p> These listed below are still working but may in the future not work
any more. All of them are just short cuts to a menu action and since menu
actions can now be "inlined", all known OSC controllers can call them directly.
Any of these actions that can be moved to session->action calls may reapear.
</p>

  <tr><th><kbd class="osc">/mark_in</kbd></th>
  <td>Marks the begining of a range at the current transport position</td></tr>
  <tr><th><kbd class="osc">/mark_out</kbd></th>
  <td>Marks the end of a range at the current transport position</td></tr>
  <tr><th><kbd class="osc">/set_loop_range</kbd></th>
  <td>Uses edit range as loop range</td></tr>
  <tr><th><kbd class="osc">/set_session_range</kbd></th>
  <td>Uses edit range as session range</td></tr>
  <tr><th><kbd class="osc">/quick_snapshot_switch</kbd></th>
  <td>Take a snapshot and switch to new version</td></tr>
  <tr><th><kbd class="osc">/quick_snapshot_stay</kbd></th>
  <td>Take a snapshot and keep working on this version</td></tr>
  <tr><th><kbd class="osc">/fit_*_track(s)</kbd></th>
  <td>Were <em>*</em> is one of 1, 2, 4, 8, 16, 32 or all. Fits this
  many tracks in editor window. (add s for more than 1)</td></tr>
  <tr><th><kbd class="osc">/zoom_*</kbd></th>
  <td>Zoom editor to include <em>*</em> where <em>*</em> is 100_ms, 1_sec,
  10_sec, 1_min, 5_min, 10_min or to_session</td></tr>
  <tr><th><kbd class="osc">/temporal_zoom_in</kbd></th>
  <td>Zoom editor in to show less time</td></tr>
  <tr><th><kbd class="osc">/temporal_zoom_out</kbd></th>
  <td>Zoom editor out to show more time</td></tr>
  <tr><th><kbd class="osc">/scroll_up_1_track</kbd></th>
  <td>Scroll the editor pane up 1 track</td></tr>
  <tr><th><kbd class="osc">/scroll_up_1_page</kbd></th>
  <td>Scroll the editor pane up 1 page</td></tr>
  <tr><th><kbd class="osc">/scroll_dn_1_track</kbd></th>
  <td>Scroll the editor pane down 1 track</td></tr>
  <tr><th><kbd class="osc">/scroll_dn_1_page</kbd></th>
  <td>Scroll the editor pane down 1 page</td></tr>
  <tr><th><kbd class="osc">/set_punch_range</kbd></th>
  <td>Uses edit range as punch range</td></tr>
  <dt><kbd class="osc">/toggle_all_rec_enables</kbd></th>
  <td>(toggles all tracks' recording state)</dd-->