diff --git a/truths/truths.lua b/truths/truths.lua
index 47f20ad..cf1130e 100644
--- a/truths/truths.lua
+++ b/truths/truths.lua
@@ -1,100 +1,56 @@
 -- truths
 
 local BGUtil = include('bitgraves/common/bgutil')
+local BGMidi = include('bitgraves/common/bgmidi')
 local Hexagon = include('bitgraves/common/hexagon')
 
 engine.name = 'Truths'
 mid = nil
 
 local indexOffset = 2
+local MPD218
 
 function init()
-  audio:rev_off() -- no system reverb
-  audio:pitch_off() -- no system pitch analysis
-  audio:monitor_mono() -- expect only channel 1 input
+  BGUtil.configureSystemStuff()
 
-  params:add_control("bend", "bend", controlspec.new(0, 1, 'lin', 0, 0, ''))
-  params:set_action("bend", function(x)
-    engine.bend(util.linlin(0, 1, 0, -2, x))
-  end)
-  
-  params:add_control("carrierSource", "carrierSource", controlspec.new(0, 1, 'lin', 0, 0, ''))
-  params:set_action("carrierSource", function(x)
-    engine.carrierInAmp(util.linlin(0, 1, 1, 0, x))
-    engine.carrierNoiseAmp(util.linlin(0, 1, 0.2, 1, x))
-  end)
-  
-  params:add_control("modulatorSource", "modulatorSource", controlspec.new(0, 1, 'lin', 0, 0, ''))
-  params:set_action("modulatorSource", function(x)
-    engine.modSource(x)
-  end)
-  
-  params:add_control("sustain", "sustain", controlspec.new(0, 1, 'lin', 0, 0, ''))
-  params:set_action("sustain", function(x)
-    engine.sustain(x)
-  end)
+  BGUtil.addEngineControlParam(params, { id = "amp" })
+  BGUtil.addEngineControlParam(params, {
+    id = "bend",
+    max = 2,
+    action = function(x)
+      engine.bend(x * -1) -- max < 1 fails for some reason
+    end,
+  })
+  BGUtil.addEngineControlParam(params, { id = "modSource" })
+  BGUtil.addEngineControlParam(params, { id = "sustain" })
+  BGUtil.addEngineControlParam(params, {
+    id = "carrierSource",
+    action = function(x)
+      engine.carrierInAmp(util.linlin(0, 1, 1, 0, x))
+      engine.carrierNoiseAmp(util.linlin(0, 1, 0.2, 1, x))
+    end,
+  })
 
-  params:add_control("amp", "amp", controlspec.new(0, 1, 'lin', 0, 0, ''))
-  params:set_action("amp", function(x)
-    engine.amp(x)
-  end)
-  
   params:add_control("monitor", "monitor", controlspec.new(0, 1, 'lin', 0, 0, ''))
   params:set_action("monitor", function(x)
     audio.level_monitor(x)
   end)
   
+  MPD218 = BGMidi.newInputMappingMPD218({
+    [3] = 'bend',
+    [9] = 'carrierSource',
+    [12] = 'modSource',
+    [13] = 'sustain',
+    [14] = 'monitor',
+    [15] = 'amp',
+    -- [16] = 'padOffset',
+  })
+  
   mid = midi.connect()
   mid.event = midiEvent
   redraw()
 end
 
-function enc(nEnc, delta)
-
-end
-
--- mapping from Akai MPD218 knobs to param handlers
-local ccAkaiMapping = {
-  [3] = 'bend',
-  [9] = 'carrierSource',
-  [12] = 'modulatorSource',
-  [13] = 'sustain',
-  [14] = 'monitor',
-  [15] = 'amp',
-  [16] = 'padOffset',
-}
-
-local ccHandlers = {
-  ['bend'] = function(val)
-    params:set('bend', val)
-    return 'bend ' .. val
-  end,
-  ['carrierSource'] = function(val)
-    params:set('carrierSource', val)
-    return 'carrier noise ' .. val
-  end,
-  ['modulatorSource'] = function(val)
-    params:set('modulatorSource', val)
-    return 'in mod ' .. val
-  end,
-  ['sustain'] = function(val)
-    params:set('sustain', val)
-    return 'sustain ' .. val
-  end,
-  ['monitor'] = function(val)
-    params:set('monitor', val)
-    return 'monitor ' .. val
-    end,
-  ['amp'] = function(val)
-    params:set('amp', val)
-    return 'amp ' .. val
-  end,
-  ['padOffset'] = function(val)
-    indexOffset = math.floor(util.linlin(0, 1, 0, 12, val))
-    return 'pad offset ' .. indexOffset
-  end,
-}
-
 function midiEvent(data)
   -- tab.print(midi.to_msg(data))
   local d = midi.to_msg(data)
@@ -105,14 +61,13 @@ function midiEvent(data)
     local index = d.note - 36
     engine.noteOff(index + indexOffset)
   elseif d.type == 'cc' then
-    local handler = ccAkaiMapping[d.cc]
-    if handler ~= nil and ccHandlers[handler] ~= nil then
-      local msg = ccHandlers[handler](d.val / 127)
+    local handled, msg = BGMidi.handleCCMPD218(MPD218, params, d.cc, d.val)
+    if handled then
       redraw(msg)
     end
   end
 end
 
 function redraw(msg)
-  Hexagon:draw(msg, ccAkaiMapping)
+  Hexagon:drawFancy(MPD218, msg)
 end