3 title: Calculating Feedback and Strip-types Values
6 <p><em>/set_surface</em> has two values the user needs to calculate before
7 use. In general these will not be calculated at run time, but
8 beforehand. There may be more than one button with different values
9 to turn various kinds of feedback on or off or to determine which
10 kinds of strips are currently viewed/controlled.
12 <p>Both ,<em>feedback</em> and <em>strip-types</em> use bitsets to keep
13 track what they are doing. Any number in a computer is made out of
14 bits that are on or off, but we represent them as normal base 10
15 numbers. Any one bit turned on will add a unique value to the
16 number as a whole. So for each kind of feedback or strip type
17 to be used, that number should be added to the total.</p>
20 strip_types is an integer made up of bits. The easy way to
21 deal with this is to think of strip_types items being worth a number and
22 then adding all those numbers together for a value to send.
23 Strip Types will determine What kind of strips will be included in
24 bank. This would include: Audio, MIDI, busses, VCAs, Master, Monitor
25 and hidden or selected strips.
57 Selected and Hidden bits are normally not needed as Ardour defaults to
58 showing Selected strips and not showing Hidden strips. The purpose of
59 these two flags is to allow showing only Selected strips or only
60 Hidden strips. Using Hidden with other flags will allow Hidden strips
61 to show inline with other strips.
64 Some handy numbers to use might be: 15 (all tracks and buses), 31
65 (add VCAs to that). Master or Monitor strips are generally not useful
66 on a surface that has dedicated controls for these strips as there are
67 /master* and /monitor* commands already. However, on a surface with
68 just a bank of fader strips, adding master or monitor would allow
69 access to them within the banks. Selected would be useful for working
70 on a group or a set of user selected strips. Hidden shows strips the
75 <p>Feedback is an integer made up of bits. The easy way to
76 deal with this is to think of feedback items being worth a number and
77 then adding all those numbers together for a value to send.
81 1 - Button status for strips.
84 2 - Variable control values for strips.
87 4 - Send SSID as path extension.
90 8 - heartbeat to surface.
93 16 - Enable master section feedback.
96 32 - Send Bar and Beat.
102 128 - Send meter as dB (-193 to +6) or 0 to 1 depending on gainmode
105 256 - Send meter a 16 bit value where each bit is a level
106 and all bits of lower level are on. For use in a LED strip. This
107 will not work if the above option is turned on.
110 512 - Send signal present, true if level is higher than -40dB
113 1024 - Send position in samples
116 2048 - Send position in time, hours, minutes, seconds and milliseconds
119 8192 - Turn on extra select channel feedback beyond what a /strip supports
123 So using a value of 19 would turn on feedback for strip and master
124 controls, but leave meters, timecode and bar/beat feedback off.