slow to fast to ?????

lib/parts.lua

@@ -4,6 +4,8 @@
 local parts = {}
 
 function parts.init()
+  parts.quarter_beat = 0
+  parts.sixteenth_beat = 0
   -- parts.whatever_we_need = 0
 end
 
@@ -26,6 +28,45 @@ function parts:quarter_notes(phase)
     engine.amp(.5)
     engine.hz(880)
   end
+  self.quarter_beat = self.quarter_beat+1
+  local beat = self.quarter_beat
+  if beat>32 then
+    -- rest
+  elseif beat%31==0 then engine.hz(493.88/2)
+  elseif beat%29==0 then engine.hz(523.25/2)
+  elseif beat%27==0 then engine.hz(392.00/2)
+  elseif beat%25==0 then engine.hz(329.63/2)
+  elseif beat%23==0 then engine.hz(329.63/2)
+  elseif beat%21==0 then engine.hz(329.63/2)
+  elseif beat%17==0 then engine.hz(261.63/2)
+  elseif beat%15==0 then engine.hz(329.63/2)
+  elseif beat%11==0 then engine.hz(329.63/2)
+  elseif beat%9==0 then engine.hz(246.94/2)
+  elseif beat%7==0 then engine.hz(329.63/2)
+  elseif beat%5==0 then engine.hz(329.63/2)
+  elseif beat%1==0 then engine.hz(220.00/2)
+  end
+end
+
+function parts:sixteenth_notes(phase)
+  self.sixteenth_beat = self.sixteenth_beat+1
+  local beat = self.sixteenth_beat
+  if beat<64 then
+    -- nothing
+  elseif beat%31==0 then engine.hz(493.88)
+  elseif beat%29==0 then engine.hz(523.25)
+  elseif beat%27==0 then engine.hz(392.00)
+  elseif beat%25==0 then engine.hz(329.63)
+  elseif beat%23==0 then engine.hz(329.63)
+  elseif beat%21==0 then engine.hz(329.63)
+  elseif beat%17==0 then engine.hz(261.63)
+  elseif beat%15==0 then engine.hz(329.63)
+  elseif beat%11==0 then engine.hz(329.63)
+  elseif beat%9==0 then engine.hz(246.94)
+  elseif beat%7==0 then engine.hz(329.63)
+  elseif beat%5==0 then engine.hz(329.63)
+  elseif beat%1==0 then engine.hz(220.00)
+  end
 end
 
 function parts:dotted_half_notes(phase)

song.lua

@@ -34,6 +34,7 @@ function init()
   softclock.add('b', 1/4, function(phase) parts:quarter_notes(phase) end)
   softclock.add('c', 3/4, function(phase) parts:dotted_half_notes(phase) end)
   softclock.add('d', 11/17, function(phase) parts:crazy_part(phase) end)
+  softclock.add('e', 1/16, function(phase) parts:sixteenth_notes(phase) end)
   super_metro:start()
   redraw()
 end