From b32579e6e11a639000c8d9161e1bf26d5c5e8fa4 Mon Sep 17 00:00:00 2001
From: Gordon JC Pearce <gordonjcp@gmail.com>
Date: Tue, 7 Jan 2025 14:58:50 +0000
Subject: [PATCH] not quite good enough MIDI

---
 plugin/alphaosc.cpp | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/plugin/alphaosc.cpp b/plugin/alphaosc.cpp
index 0ae80de..860e0e2 100644
--- a/plugin/alphaosc.cpp
+++ b/plugin/alphaosc.cpp
@@ -37,8 +37,8 @@ void AlphaOsc::run(const float **, float **outputs, uint32_t frames, const MidiE
     bzero(outputs[0], sizeof(float) * frames);
 
     // cast unused parameters to void for now to stop the compiler complaining
-    (void)midiEventCount;
-    (void)midiEvents;
+    //(void)midiEventCount;
+    //(void)midiEvents;
 
     uint32_t i;
     uint32_t osc;
@@ -53,6 +53,20 @@ void AlphaOsc::run(const float **, float **outputs, uint32_t frames, const MidiE
     float out, in;
 
     // handle any MIDI events
+    for(i=0; i<midiEventCount; i++) {
+        if (midiEvents[i].data[0] == 0x90) {
+            // note on
+            note = midiEvents[i].data[1];
+            freq = 130.81*powf(2, (note-48)/12.0f);
+            gate = 1;
+        }
+
+        if (midiEvents[i].data[0] == 0x80 && midiEvents[1].data[1] == note) {
+            // note off for same note
+            gate = 0;
+        }
+
+    }
 
     // steeply "logarithmic" curve similar to the Juno 106 LFO rate curve
     // goes from about 0.1Hz to about 60Hz because this "feels about right"
@@ -194,7 +208,7 @@ void AlphaOsc::run(const float **, float **outputs, uint32_t frames, const MidiE
         hpfy = out;
 
         // scale the output and write it to the buffer
-        outputs[0][i] = out * 0.5;
+        outputs[0][i] = gate * out * 0.5;
     }
 }