141 lines
4.4 KiB
HTML
141 lines
4.4 KiB
HTML
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<p><em>/set_surface</em> has two values the user needs to calculate before
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use. In general these will not be calculated at run time, but
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beforehand. There may be more than one button with different values
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to turn various kinds of feedback on or off or to determine which
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kinds of strips are currently viewed/controlled.
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</p>
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<p>Both ,<em>feedback</em> and <em>strip-types</em> use bitsets to keep
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track what they are doing. Any number in a computer is made out of
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bits that are on or off, but we represent them as normal base 10
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numbers. Any one bit turned on will add a unique value to the
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number as a whole. So for each kind of feedback or strip type
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to be used, that number should be added to the total.</p>
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<h3>strip_types</h3>
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<p>
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strip_types is an integer made up of bits. The easy way to
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deal with this is to think of strip_types items being worth a number and
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then adding all those numbers together for a value to send.
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Strip Types will determine What kind of strips will be included in
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bank. This would include: Audio, MIDI, busses, VCAs, Master, Monitor
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and hidden or selected strips.
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</p>
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<ul>
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<li>
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1 - AudioTracks.
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</li>
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<li>
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2 - MidiTracks.
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</li>
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<li>
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4 - AudioBuses.
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</li>
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<li>
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8 - MidiBuses.
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</li>
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<li>
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16 - VCAs.
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</li>
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<li>
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32 - Master.
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</li>
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<li>
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64 - Monitor.
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</li>
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<li>
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128 - Audio Aux.
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</li>
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<li>
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256 - Selected.
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</li>
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<li>
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512 - Hidden.
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</li>
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</ul>
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<p class="note">
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Selected and Hidden bits are normally not needed as Ardour defaults to
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showing Selected strips and not showing Hidden strips. The purpose of
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these two flags is to allow showing only Selected strips or only
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Hidden strips. Using Hidden with other flags will allow Hidden strips
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to show inline with other strips.
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</p>
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<p>
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Some handy numbers to use might be: 15 (all tracks and buses), 31
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(add VCAs to that). Master or Monitor strips are generally not useful
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on a surface that has dedicated controls for these strips as there are
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/master* and /monitor* commands already. However, on a surface with
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just a bank of fader strips, adding master or monitor would allow
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access to them within the banks. Selected would be useful for working
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on a group or a set of user selected strips. Hidden shows strips the
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GUI has hidden.
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</p>
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<p class-"note">
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Audio Aux? say what? I am sure most people will have noticed that they
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can find no <em>Aux</em> strips in the Ardour mixer. There are none.
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There are buses that can be used a number of ways. From analog days,
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in OSC, a bus is something that gets used as a sub mix before ending up
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going to Master. An auxiliary bus is used like a separate mixer and
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it's output goes outside the program or computer to be used as:
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a monitor mix, a back up recording, or what have you. In OSC where
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controller strips may be limited, it may be useful not to use up a
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strip for an aux that is not really a part of the mix. It is also
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useful to get a list of only aux buses if the control surface is a
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phone used to provide talent monitor mix control on stage. Each
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performer would be able to mix their own monitor. The user is free
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to enable both buses and auxes if they would prefer.
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</p>
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<h3>feedback</h3>
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<p>Feedback is an integer made up of bits. The easy way to
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deal with this is to think of feedback items being worth a number and
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then adding all those numbers together for a value to send.
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</p>
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<ul>
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<li>
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1—Button status for strips.
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</li>
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<li>
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2—Variable control values for strips.
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</li>
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<li>
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4—Send SSID as path extension.
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</li>
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<li>
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8—heartbeat to surface.
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</li>
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<li>
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16—Enable master section feedback.
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</li>
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<li>
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32—Send Bar and Beat.
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</li>
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<li>
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64—Send timecode.
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</li>
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<li>
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128—Send meter as dB (-193 to +6) or 0 to 1 depending on gainmode
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</li>
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<li>
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256—Send meter a 16 bit value where each bit is a level
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and all bits of lower level are on. For use in a LED strip. This
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will not work if the above option is turned on.
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</li>
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<li>
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512—Send signal present, true if level is higher than -40dB
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</li>
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<li>
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1024—Send position in samples
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</li>
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<li>
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2048—Send position in time, hours, minutes, seconds and milliseconds
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</li>
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<li>
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8192—Turn on extra select channel feedback beyond what a /strip supports
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</li>
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</ul>
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<p>
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So using a value of 19 would turn on feedback for strip and master
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controls, but leave meters, timecode and bar/beat feedback off.
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</p>
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