From 19e75512541c3526fe20d96a5f7ae8edf18ba3ea Mon Sep 17 00:00:00 2001
From: gretchen <gretchen@gnar.cool>
Date: Sat, 16 Nov 2019 15:53:28 -0800
Subject: note_on vs note_off, vel and delay

---
 intervals.lua | 46 +++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 39 insertions(+), 7 deletions(-)

diff --git a/intervals.lua b/intervals.lua
index 8c8538d..6096e1d 100644
--- a/intervals.lua
+++ b/intervals.lua
@@ -460,25 +460,36 @@ intervals_state = {
 
 engine.name = 'PolyPerc'
 -- TODO fix globals here
--- TODO note_on vs note_off
--- TODO parameters for velocity and for note_off delay
-function play(note, once)
+function play_start(note, vel)
   if intervals_state.play_audio then
     engine.hz(midi_to_hz(note))
   end
+  if intervals_state.play_midi then
+    intervals_state.midi_out:note_on(note, vel or intervals_state.note_vel)
+  end
+end
+
+function play_stop(note, vel)
+  if intervals_state.play_midi then
+    intervals_state.midi_out:note_off(note, vel or intervals_state.note_vel)
+  end
+end
+
+
+function play(note, vel)
+  play_start(note, vel)
   if intervals_state.play_midi then
     -- if state.timer then
     -- state.timer:stop()
     -- metro.free(state.timer.id)
     -- end
     local t = metro.init()
-    t.time = 0.15
+    t.time = intervals_state.note_length
     t.event = function(time)
       t:stop()
       metro.free(t.id)
-      intervals_state.midi_out:note_off(note, 32)
+      play_stop(note, vel)
     end
-    intervals_state.midi_out:note_on(note, 80)
     t:start()
   end
 end
@@ -491,7 +502,10 @@ function init()
     b = midi.to_msg(a)
     -- monitor
     if b.type == "note_on" then
-      play(b.note, b.vel)
+      play_start(b.note, b.vel)
+    end
+    if b.type == "note_off" or b.vel == 0 then
+      play_stop(b.note, b.vel)
     end
     state_call(intervals_state, "midi", {b})
   end
@@ -530,6 +544,24 @@ function init()
         intervals_state.timer.time = value
       end
   end})
+  params:add({
+    type = "control",
+    id = "note_length",
+    name = "Note length",
+    default=60,
+    controlspec = ControlSpec.new(0.0001, 3, 'lin', 0.05, 0.55, "secs"),
+    action = function(value)
+      intervals_state.note_length = value
+  end})
+  params:add({
+    type = "control",
+    id = "note_vel",
+    name = "Note velocity",
+    default=60,
+    controlspec = ControlSpec.new(1, 127, 'lin', 1.0, 20),
+    action = function(value)
+      intervals_state.note_vel = value
+  end})
   params:bang()
 
   play(60)
-- 
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