Ramp from current value

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1

Hi folks. I’m currently working on some generative music and I’m trying to create a “CC controller” that controls the CC values of synths in another DAW. I’d like for the CC controller to ramp from one value to another, and occasionally oscillate between one and another; however, the jump from the current value of the CC to the “start” number of the ramp or oscillator can be quite stark, so I’m trying to figure out how to ramp from the current value to the starting value.

define :cc_controller do |cc_n, type, x, y, z|
  if type == "flux" then
    cc_v = (line x, y, steps: z).mirror.tick
    midi_cc cc_n, cc_v

    if cc_n == 1 then
      set :cc1, cc_v
    end
    if cc_n == 2 then
      set :cc2, cc_v
    end
    if cc_n == 3 then
      set :cc3, cc_v
    end
    if cc_n == 4 then
      set :cc4, cc_v
    end
    if cc_n == 5 then
      set :cc5, cc_v
    end
    if cc_n == 7 then
      set :cc7, cc_v
    end
    if cc_n == 8 then
      set :cc8, cc_v
    end
  end

  if type == "shift" then
  /
    if cc_n == 1 then
      cc_v = (line get[:cc1], y, inclusive: true, steps: z).ramp
    end
    if cc_n == 2 then
      cc_v = (line get[:cc2], y, inclusive: true, steps: z).ramp
    end
    if cc_n == 3 then
      cc_v = (line get[:cc3], y, inclusive: true, steps: z).ramp
    end
    if cc_n == 4 then
      cc_v = (line get[:cc4], y, inclusive: true, steps: z).ramp
    end
    if cc_n == 5 then
      x = get[:cc5]
      cc_v = (line get[:cc5], y, inclusive: true, steps: z).ramp
    end
    if cc_n == 7 then
      cc_v = (line get[:cc7], y, inclusive: true, steps: z).ramp
    end
    if cc_n == 8 then
      cc_v = (line get[:cc8], y, inclusive: true, steps: z).ramp
    end
  /
    cc_v = (line get[:cc5], y, inclusive: true, steps: z).ramp
    midi_cc cc_n, cc_v.tick
  end
end

live_loop :cc_phrase, sync: :tick do
  phrase = 0

  if phrase == 0 then
    cc_controller 5, "shift", 50, 90, 200
  end
  if phrase == 1 then
  end
  if phrase == 2 then
  end
  if phrase == 3 then
  end
  if phrase == 4 then
  end
  sleep 1
end

Above is my current code. I’ve tried many variations of “get” and “set,” but I think because the cc_phrase function is a live_loop, it’s breaking the code. Here’s the error message I commonly get:

Error on job 131: [buffer eval, line 296] - Thread death +--> :live_loop_cc_phrase
 undefined method `to_f' for (ramp ring 62.0, 62.14070351758794, 62.28140703517588, 62.42211055276382, 62.562814070351756, 62.7035175879397, 62.84422110552764, 62.984924623115575, 63.12562814070352, 63.266331658291456, 63.4070351758794, 63.54773869346734, 63.688442211055275, 63.82914572864322, 63.969849246231156, 64.1105527638191, 64.25125628140704, 64.39195979899498, 64.53266331658291, 64.67336683417085, 64.8140703517588, 64.95477386934674, 65.09547738693468, 65.23618090452261, 65.37688442211055, 65.51758793969849, 65.65829145728644, 65.79899497487438, 65.93969849246231, 66.08040201005025, 66.22110552763819, 66.36180904522612, 66.50251256281408, 66.64321608040201, 66.78391959798995, 66.92462311557789, 67.06532663316582, 67.20603015075378, 67.34673366834171, 67.48743718592965, 67.62814070351759, 67.76884422110552, 67.90954773869346, 68.05025125628141, 68.19095477386935, 68.33165829145729, 68.47236180904522, 68.61306532663316, 68.7537688442211, 68.89447236180905, 69.03517587939699, 69.17587939698493, 69.31658291457286, 69.4572864321608, 69.59798994974875, 69.73869346733669, 69.87939698492463, 70.02010050251256, 70.1608040201005, 70.30150753768845, 70.44221105527639, 70.58291457286433, 70.72361809045226, 70.8643216080402, 71.00502512562814, 71.14572864321609, 71.28643216080403, 71.42713567839196, 71.5678391959799, 71.70854271356784, 71.84924623115577, 71.98994974874373, 72.13065326633166, 72.2713567839196, 72.41206030150754, 72.55276381909547, 72.69346733668343, 72.83417085427136, 72.9748743718593, 73.11557788944724, 73.25628140703517, 73.39698492462311, 73.53768844221105, 73.678391959799, 73.81909547738694, 73.95979899497488, 74.10050251256281, 74.24120603015075, 74.3819095477387, 74.52261306532664, 74.66331658291458, 74.80402010050251, 74.94472361809045, 75.08542713567839, 75.22613065326632, 75.36683417085428, 75.50753768844221, 75.64824120603015, 75.78894472361809, 75.92964824120602, 76.07035175879398, 76.21105527638191, 76.35175879396985, 76.49246231155779, 76.63316582914572, 76.77386934673368, 76.91457286432161, 77.05527638190955, 77.19597989949749, 77.33668341708542, 77.47738693467336, 77.6180904522613, 77.75879396984925, 77.89949748743719, 78.04020100502512, 78.18090452261306, 78.321608040201, 78.46231155778895, 78.60301507537689, 78.74371859296483, 78.88442211055276, 79.0251256281407, 79.16582914572865, 79.30653266331657, 79.44723618090453, 79.58793969849246, 79.7286432160804, 79.86934673366834, 80.01005025125627, 80.15075376884423, 80.29145728643216, 80.4321608040201, 80.57286432160804, 80.71356783919597, 80.85427135678393, 80.99497487437186, 81.1356783919598, 81.27638190954774, 81.41708542713567, 81.55778894472363, 81.69849246231155, 81.8391959798995, 81.97989949748744, 82.12060301507537, 82.26130653266331, 82.40201005025125, 82.5427135678392, 82.68341708542714, 82.82412060301507, 82.96482412060301, 83.10552763819095, 83.2462311557789, 83.38693467336684, 83.52763819095478, 83.66834170854271, 83.80904522613065, 83.9497487437186, 84.09045226130652, 84.23115577889448, 84.37185929648241, 84.51256281407035, 84.65326633165829, 84.79396984924622, 84.93467336683418, 85.07537688442211, 85.21608040201005, 85.35678391959799, 85.49748743718592, 85.63819095477388, 85.77889447236181, 85.91959798994975, 86.06030150753769, 86.20100502512562, 86.34170854271358, 86.4824120603015, 86.62311557788945, 86.76381909547739, 86.90452261306532, 87.04522613065326, 87.1859296482412, 87.32663316582915, 87.46733668341709, 87.60804020100502, 87.74874371859296, 87.8894472361809, 88.03015075376885, 88.17085427135679, 88.31155778894473, 88.45226130653266, 88.5929648241206, 88.73366834170855, 88.87437185929647, 89.01507537688443, 89.15577889447236, 89.2964824120603, 89.43718592964824, 89.57788944723617, 89.71859296482413, 89.85929648241206, 90.0):SonicPi::Core::RampVector (NoMethodError)

        start = start.to_f
                     ^^^^^
Did you mean?  to_a
               to_s
Line 296: C:/Program Files/Sonic Pi/app/server/ruby/lib/sonicpi/lang/core.rb:1846:in `line'
C:/Program Files/Sonic Pi/app/server/ruby/vendor/memoist-0.16.2/lib/memoist.rb:213:in `line'
eval:296:in `block (3 levels) in __spider_eval'
eval:305:in `block (3 levels) in __spider_eval'
C:/Program Files/Sonic Pi/app/server/ruby/lib/sonicpi/lang/core.rb:2233:in `block in live_loop'
C:/Program Files/Sonic Pi/app/server/ruby/lib/sonicpi/lang/core.rb:2253:in `block (2 levels) in live_loop'
C:/Program Files/Sonic Pi/app/server/ruby/lib/sonicpi/lang/core.rb:2168:in `block in loop'
C:/Program Files/Sonic Pi/app/server/ruby/lib/sonicpi/lang/core.rb:2164:in `loop'
C:/Program Files/Sonic Pi/app/server/ruby/lib/sonicpi/lang/core.rb:2164:in `loop'
C:/Program Files/Sonic Pi/app/server/ruby/lib/sonicpi/lang/core.rb:2251:in `block in live_loop'
C:/Program Files/Sonic Pi/app/server/ruby/lib/sonicpi/runtime.rb:1202:in `block (2 levels) in __in_thread'

Any help is appreciated!

2

Bumping this to see if anyone has any ideas! I’m working on a drone composition and these switches are quite jarring.

3

Could you post the full code? The error is occurring on a line:

start = start.to_f

which doesn’t appear in your code, so it’s hard to work out what’s going wrong.
But it appears that start is a ring of values, not a single value, so you can’t call to_f on it.

4

Hi Emlyn, thank you for responding!

I’m actually starting this process from scratch hahaha. I’m going to try to do it with just like basic values first outside of the context of a composition and then try to implement it into other compositions. I’ll update here in a bit with my idea, but if you have suggestions, starting from scratch let me know!