awake_kr_prob.lua

-- awake: time changes
-- 2.0.0 @tehn
-- llllllll.co/t/21022
--
-- top loop plays notes
-- transposed by bottom loop
--
-- (grid optional)
--
-- E1 changes modes:
-- STEP/LOOP/SOUND/OPTION
--
-- K1 held is alt *
--
-- STEP
-- E2/E3 move/change
-- K2 toggle *clear
-- K3 morph *rand
--
-- LOOP
-- E2/E3 loop length
-- K2 reset position
-- K3 jump position
--
-- SOUND
-- K2/K3 selects
-- E2/E3 changes
--
-- OPTION
-- *toggle
-- E2/E3 changes

engine.name = 'KarplusRings'

hs = include('lib/halfsecond')

local MusicUtil = require "musicutil"

local options = {}
options.OUTPUT = {"audio", "midi", "audio + midi", "crow out 1+2", "crow ii JF"}
options.STEP_LENGTH_NAMES = {"1 bar", "1/2", "1/3", "1/4", "1/6", "1/8", "1/12", "1/16", "1/24", "1/32", "1/48", "1/64"}
options.STEP_LENGTH_DIVIDERS = {1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 48, 64}

local g = grid.connect()

local alt = false

mode = 1
mode_names = {"STEP","LOOP","SOUND","OPTION"}

one = {
  pos = 0,
  length = 8,
  start = 1,
  data = {1,0,3,5,6,7,8,7,0,0,0,0,0,0,0,0}
}
two = {
  pos = 0,
  length = 7,
  start = 1,
  data = {5,7,0,0,0,0,0,0,0,0,0,0,0,0,0,0}
}

local midi_out_device
local midi_out_channel

local scale_names = {}
notes = {}
local active_notes = {}

local edit_ch = 1
local edit_pos = 1

snd_sel = 1
snd_names = {"decay","coef","lpff","lpfg","bpff","bpfr"}
snd_params = {"decay","coef","lpf freq","lpf gain","bpf freq","bpf res"}

local BeatClock = require 'beatclock'
local clk = BeatClock.new()
local clk_midi = midi.connect()
clk_midi.event = function(data)
  clk:process_midi(data)
end

local notes_off_metro = metro.init()

function build_scale()
  notes = MusicUtil.generate_scale_of_length(params:get("root_note"), params:get("scale_mode"), 16)
  local num_to_add = 16 - #notes
  for i = 1, num_to_add do
    table.insert(notes, notes[16 - num_to_add])
  end
end

local function all_notes_off()
  if (params:get("output") == 2 or params:get("output") == 3) then
    for _, a in pairs(active_notes) do
      midi_out_device:note_off(a, nil, midi_out_channel)
    end
  end
  active_notes = {}
end

local function step()
  all_notes_off()
  
  one.pos = one.pos + 1
  if one.pos > one.length then one.pos = 1 end
  two.pos = two.pos + 1
  if two.pos > two.length then two.pos = 1 end
  
  if one.data[one.pos] > 0 then
    local note_num = notes[one.data[one.pos]+two.data[two.pos]]
    local freq = MusicUtil.note_num_to_freq(note_num)
    
    -- Trigger Probability
    if math.random(100) <= params:get("probability") then
      -- Audio engine out
      if params:get("output") == 1 or params:get("output") == 3 then
        engine.hz(freq)
      elseif params:get("output") == 4 then
        crow.output[1].volts = (note_num-60)/12
        crow.output[2].execute()
      elseif params:get("output") == 5 then
        crow.ii.jf.play_note((note_num-60)/12,5)
      end
      
      -- MIDI out
      if (params:get("output") == 2 or params:get("output") == 3) then
        midi_out_device:note_on(note_num, 96, midi_out_channel)
        table.insert(active_notes, note_num)

        -- Note off timeout
        if params:get("note_length") < 4 then
          notes_off_metro:start((60 / clk.bpm / clk.steps_per_beat / 4) * params:get("note_length"), 1)
        end
      end
    end
  end

  if g then
    gridredraw()
  end
  redraw()

end

local function stop()
  all_notes_off()
end


function init()
  for i = 1, #MusicUtil.SCALES do
    table.insert(scale_names, string.lower(MusicUtil.SCALES[i].name))
  end
  
  midi_out_device = midi.connect(1)
  midi_out_device.event = function() end
  
  clk.on_step = step
  clk.on_stop = stop
  clk.on_select_internal = function() clk:start() end
  clk.on_select_external = reset_pattern
  clk:add_clock_params()
  params:set("bpm", 91)
  
  notes_off_metro.event = all_notes_off
  
  params:add{type = "option", id = "output", name = "output",
    options = options.OUTPUT,
    action = function(value)
      all_notes_off()
      if value == 4 then crow.output[2].action = "{to(5,0),to(0,0.25)}"
      elseif value == 5 then
        crow.ii.pullup(true)
        crow.ii.jf.mode(1)
      end
    end}
  params:add{type = "number", id = "midi_out_device", name = "midi out device",
    min = 1, max = 4, default = 1,
    action = function(value) midi_out_device = midi.connect(value) end}
  params:add{type = "number", id = "midi_out_channel", name = "midi out channel",
    min = 1, max = 16, default = 1,
    action = function(value)
      all_notes_off()
      midi_out_channel = value
    end}
  params:add_separator()
  
  params:add{type = "option", id = "step_length", name = "step length", options = options.STEP_LENGTH_NAMES, default = 8,
    action = function(value)
      clk.ticks_per_step = 96 / options.STEP_LENGTH_DIVIDERS[value]
      clk.steps_per_beat = options.STEP_LENGTH_DIVIDERS[value] / 4
      clk:bpm_change(clk.bpm)
    end}
  params:add{type = "option", id = "note_length", name = "note length",
    options = {"25%", "50%", "75%", "100%"},
    default = 4}
  
  params:add{type = "option", id = "scale_mode", name = "scale mode",
    options = scale_names, default = 5,
    action = function() build_scale() end}
  params:add{type = "number", id = "root_note", name = "root note",
    min = 0, max = 127, default = 60, formatter = function(param) return MusicUtil.note_num_to_name(param:get(), true) end,
    action = function() build_scale() end}
  params:add{type = "number", id = "probability", name = "probability",
    min = 0, max = 100, default = 100,}
  params:add_separator()

  cs_AMP = controlspec.new(0,1,'lin',0,0.5,'')
  params:add{type="control",id="amp",controlspec=cs_AMP,
    action=function(x) engine.amp(x) end}

  cs_DECAY = controlspec.new(0,10,'lin',0,0.5,'')
  params:add{type="control",id="decay",controlspec=cs_DECAY,
    action=function(x) engine.decay(x) end}

  cs_COEF = controlspec.new(0,1,'lin',0,0.1,'')
  params:add{type="control",id="coef",controlspec=cs_COEF,
    action=function(x) engine.coef(x) end}

  cs_LPF_F = controlspec.new(10,20000,'exp',0,1200,'hz')
  params:add{type="control",id="lpf freq",controlspec=cs_LPF_F,
    action=function(x) engine.lpf_freq(x) end}

  cs_LPF_G = controlspec.new(0,2,'lin',0,0.5,'')
  params:add{type="control",id="lpf gain",controlspec=cs_LPF_G,
    action=function(x) engine.lpf_gain(x) end}

  cs_BPF_F = controlspec.new(10,20000,'exp',0,3000,'hz')
  params:add{type="control",id="bpf freq",controlspec=cs_BPF_F,
    action=function(x) engine.bpf_freq(x) end}

  cs_BPF_R = controlspec.new(0.01,2,'lin',0,0.5,'')
  params:add{type="control",id="bpf res",controlspec=cs_BPF_R,
    action=function(x) engine.bpf_res(x) end}

  params:default()

  clk:start()
  
  hs.init()
end

function g.key(x, y, z)
  local grid_h = g.rows
  if z > 0 then
    if (grid_h == 8 and edit_ch == 1) or (grid_h == 16 and y <= 8) then
      if one.data[x] == 9-y then
        one.data[x] = 0
      else
        one.data[x] = 9-y
      end
    end
    if (grid_h == 8 and edit_ch == 2) or (grid_h == 16 and y > 8) then
      if grid_h == 16 then y = y - 8 end
      if two.data[x] == 9-y then
        two.data[x] = 0
      else
        two.data[x] = 9-y
      end
    end
    gridredraw()
    redraw()
  end
end

function gridredraw()
  local grid_h = g.rows
  g:all(0)
  if edit_ch == 1 or grid_h == 16 then
    for x = 1, 16 do
      if one.data[x] > 0 then g:led(x, 9-one.data[x], 5) end
    end
    if one.pos > 0 and one.data[one.pos] > 0 then
      g:led(one.pos, 9-one.data[one.pos], 15)
    else
      g:led(one.pos, 1, 3)
    end
  end
  if edit_ch == 2 or grid_h == 16 then
    local y_offset = 0
    if grid_h == 16 then y_offset = 8 end
    for x = 1, 16 do
      if two.data[x] > 0 then g:led(x, 9-two.data[x] + y_offset, 5) end
    end
    if two.pos > 0 and two.data[two.pos] > 0 then
      g:led(two.pos, 9-two.data[two.pos] + y_offset, 15)
    else
      g:led(two.pos, 1 + y_offset, 3)
    end
  end
  g:refresh()
end

function enc(n, delta)
  if n==1 then
    mode = util.clamp(mode+delta,1,4)
  elseif mode == 1 then --step
    if n==2 then
      if alt then
        params:delta("probability", delta)
      else
        local p = (edit_ch == 1) and one.length or two.length
        edit_pos = util.clamp(edit_pos+delta,1,p)
      end
    elseif n==3 then
      if edit_ch == 1 then
        one.data[edit_pos] = util.clamp(one.data[edit_pos]+delta,0,8)
      else
        two.data[edit_pos] = util.clamp(two.data[edit_pos]+delta,0,8)
      end
    end
  elseif mode == 2 then --loop
    if n==2 then
      one.length = util.clamp(one.length+delta,1,16)
    elseif n==3 then
      two.length = util.clamp(two.length+delta,1,16)
    end
  elseif mode == 3 then --sound
    if n==2 then
      params:delta(snd_params[snd_sel], delta)
    elseif n==3 then
      params:delta(snd_params[snd_sel+1], delta)
    end
  elseif mode == 4 then --option
    if n==2 then
      if alt==false then
        params:delta("bpm", delta)
      else
        params:delta("step_length",delta)
      end
    elseif n==3 then
      if alt==false then
        params:delta("root_note", delta)
      else
        params:delta("scale_mode", delta)
      end
    end
  end
  redraw()
end

function key(n,z)
  if n==1 then
    alt = z==1

  elseif mode == 1 then --step
    if n==2 and z==1 then
      if not alt==true then
        -- toggle edit
        if edit_ch == 1 then
          edit_ch = 2
          if edit_pos > two.length then edit_pos = two.length end
        else
          edit_ch = 1
          if edit_pos > one.length then edit_pos = one.length end
        end
      else
        -- clear
        for i=1,one.length do one.data[i] = 0 end
        for i=1,two.length do two.data[i] = 0 end 
      end
    elseif n==3 and z==1 then
      if not alt==true then
        -- morph
        if edit_ch == 1 then
          for i=1,one.length do
            if one.data[i] > 0 then
              one.data[i] = util.clamp(one.data[i]+math.floor(math.random()*3)-1,0,8)
            end
          end
        else
          for i=1,two.length do
            if two.data[i] > 0 then
              two.data[i] = util.clamp(two.data[i]+math.floor(math.random()*3)-1,0,8)
            end
          end
        end
      else
        -- random
        for i=1,one.length do one.data[i] = math.floor(math.random()*9) end
        for i=1,two.length do two.data[i] = math.floor(math.random()*9) end
        gridredraw()
      end
    end
  elseif mode == 2 then --loop
    if n==2 and z==1 then
      one.pos = 0
      two.pos = 0
      if alt==true then clk:reset() end
    elseif n==3 and z==1 then
      one.pos = math.floor(math.random()*one.length)
      two.pos = math.floor(math.random()*two.length)
    end
  elseif mode == 3 then --sound
    if n==2 and z==1 then
      snd_sel = util.clamp(snd_sel - 2,1,5)
    elseif n==3 and z==1 then
      snd_sel = util.clamp(snd_sel + 2,1,5)
    end
  elseif mode == 4 then --option
    if n==2 then
    elseif n==3 then
    end
  end

--[[
      gridredraw()
      
      
      if not clk.external then
        if clk.playing then
          clk:stop()
        else
          clk:start()
        end
      end
]]--

  redraw()
end

function redraw()
  screen.clear()
  screen.line_width(1)
  screen.aa(0)
  -- edit point
  if mode==1 then
    screen.move(26 + edit_pos*6, edit_ch==1 and 33 or 63)
    screen.line_rel(4,0)
    screen.level(15)
    if alt then
      screen.move(0, 30)
      screen.level(1)
      screen.text("prob")
      screen.move(0, 45)
      screen.level(15)
      screen.text(params:get("probability"))
    end
    screen.stroke()
  end
  -- loop lengths
  screen.move(32,30)
  screen.line_rel(one.length*6-2,0)
  screen.move(32,60)
  screen.line_rel(two.length*6-2,0)
  screen.level(mode==2 and 6 or 1)
  screen.stroke()
  -- steps
  for i=1,one.length do
    screen.move(26 + i*6, 30 - one.data[i]*3)
    screen.line_rel(4,0)
    screen.level(i == one.pos and 15 or ((edit_ch == 1 and one.data[i] > 0) and 4 or (mode==2 and 6 or 1)))
    screen.stroke()
  end
  for i=1,two.length do
    screen.move(26 + i*6, 60 - two.data[i]*3)
    screen.line_rel(4,0)
    screen.level(i == two.pos and 15 or ((edit_ch == 2 and two.data[i] > 0) and 4 or (mode==2 and 6 or 1)))
    screen.stroke()
  end
  -- txt
--[[  screen.level((not alt and not KEY3) and 15 or 4)
  screen.move(0,10)
  screen.text("bpm:"..params:get("bpm"))
  screen.level(alt and 15 or 4)
  screen.move(0,20)
  screen.text("sc:"..params:get("scale_mode"))
  screen.level(KEY3 and 15 or 4)
  screen.move(0,30)
  screen.text("rt:"..MusicUtil.note_num_to_name(params:get("root_note"), true))
  screen.level(4)
  screen.move(0,60)
  if alt then screen.text("cut/rel")
  elseif KEY3 then screen.text("loop") end
  --]]

  screen.level(4)
  screen.move(0,10)
  screen.text(mode_names[mode])

  if mode==3 then
    screen.level(1)
    screen.move(0,30)
    screen.text(snd_names[snd_sel])
    screen.level(15)
    screen.move(0,40)
    screen.text(params:string(snd_params[snd_sel]))
    screen.level(1)
    screen.move(0,50)
    screen.text(snd_names[snd_sel+1])
    screen.level(15)
    screen.move(0,60)
    screen.text(params:string(snd_params[snd_sel+1]))
  elseif mode==4 then
    screen.level(1)
    screen.move(0,30)
    screen.text(alt==false and "bpm" or "div")
    screen.level(15)
    screen.move(0,40)
    screen.text(alt==false and params:get("bpm") or params:string("step_length")) 
    screen.level(1)
    screen.move(0,50)
    screen.text(alt==false and "root" or "scale")
    screen.level(15)
    screen.move(0,60)
    screen.text(alt==false and params:string("root_note") or params:string("scale_mode"))
  end



  screen.update()
end

function cleanup ()
  clk:stop()
end