updates

M0_Simple_Synth_05/M0_Simple_Synth_05.ino

@@ -16,7 +16,8 @@
 //  The code is just doing the squarewaves at the moment with very simple counters.
 //  In the interrupt, we just count the number of ticks here until flipping the bit.
 
-// LFO Counters.  minLFO is actually a high number because its a larger tick to
+// LFO Counter Bounds.  The higher the number, the longer it takes to count to it, so
+// a high frequency is really indicated with a smaller number.
 # define maxLFO  40
 # define minLFO 500
 
@@ -43,7 +44,6 @@ Adafruit_DotStar strip = Adafruit_DotStar(
 uint8_t CC1 = 7;
 uint8_t CC2 = 114;
 
-
 volatile uint16_t counter = 0;
 volatile uint8_t state = 0;  // LFO Bit On/Off
 volatile uint16_t counterCompare = 100;

M0_Simple_Synth_05/README.md

@@ -7,4 +7,23 @@ So this is an approximation of the following circuit
 ![Capture1](https://github.com/robstave/trinketM0Synth/blob/master/M0_Simple_Synth_05/images/circuit.PNG)
 
 
-![Capture1](https://github.com/robstave/trinketM0Synth/blob/master/M0_Simple_Synth_05/images/oneMinusLogPNG.PNG)
+![Capture1](https://github.com/robstave/trinketM0Synth/blob/master/M0_Simple_Synth_05/images/oneMinusLogPNG.PNG)
+
+The code is really not as complicated as it seems.  We are just really manipulating two counters and applying boolean logic to the results of the timers. The result is sent to a pin to make sound.
+
+This approach has the flaws that were mentioned earlier that the resolution is not inear as we go up the scale.
+
+For example:
+If a particular note is generated by a counter counting up to 100, then when we reduce the counter to 50, we actually get a note that is an octave higher.
+
+If you divide that counter amount by 2 again, you get another octave.  Works great, but notice the resolution gets worse too.
+
+100 to 50 have 50 values
+50 to 25 has 25
+25 to 12.5 has 12 (rounded)
+
+Also, with Midi, you only really get 128 values to send.  Technically, this is kinda a problem in the analog version too in that you often see a "corse" and "fine" knob.
+
+Still, its a fun start and very 8-bity.
+
+![YouTube Example](https://www.youtube.com/watch?v=3eiYu0klEis)

M0_Simple_Synth_08/M0_Simple_Synth_08.ino

@@ -7,17 +7,24 @@
    M0 Trinket Synth - Exercise 08
 
    Previously:
-   make a squarewave sound (2 Cores) with 3 CCs each
+   Two Squarewave oscillator(2 Cores) with 3 CCs each
    HfCC - CC to control pitch
    LfoCC - CC to control LFO Frequency
-
-
-   Added:
    LfoOnCC - CC to turn core on/off/LFO  so its always on, always off or squarewave LFO
-   Also another CC for the mixer
-   Toggle Mixer to be sum/nand/xor
+   
+   Also another CC for the mixer - Toggle Mixer to be sum/nand/xor
+
+   So we are up to 7 knobs.
+   
+   At this point, all the values were getting unmanagable, so lets 
+   make a struct per core.
 
+   Added, rebase
 
+   Also, did map the LFO control a bit to have an off/lfo/on mode
+  
+   
+   Technically, nothing new here.  Just a rebase.
 */
 
 
@@ -27,7 +34,7 @@
 //  The code is just doing the squarewaves at the moment with very simple counters.
 //  In the interrupt, we just count the number of ticks here until flipping the bit.
 
-// LFO Counters.  minLFO is actually a high number because its a larger tick to
+// LFO Counter bounds.  A small number means it will take less time to reset the timer (and flip the bit)
 # define maxLFO  40
 # define minLFO 500
 
@@ -71,11 +78,11 @@ CoreState coreArray[] = {
 
 
   {
-    //   HF CC = 10;
+    //   LFO CC = 10;
     // initialize at 90
     10, 0, 90, 0, 91,
 
-    //   LFO CC = 74;
+    //   HF CC = 74;
     74, 0, 90, 0, 91,
 
     //   LFO ON CC = 71;

M0_Simple_Synth_09/M0_Simple_Synth_09.ino

@@ -7,13 +7,18 @@
    M0 Trinket Synth - Exercise 09
 
    Previously:
-   make a squarewave sound (2 Cores) with 3 CCs each
+   Two Squarewave oscillator(2 Cores) with 3 CCs each
    HfCC - CC to control pitch
    LfoCC - CC to control LFO Frequency
    LfoOnCC - CC to turn core on/off/LFO  so its always on, always off or squarewave LFO
+   
+   Also another CC for the mixer - Toggle Mixer to be sum/nand/xor
 
-   Also another CC for the mixer
-   Toggle Mixer to be sum/nand/xor
+   So we are up to 7 knobs.
+   
+   At this point, all the values were getting unmanagable, so lets 
+   make a struct per core.
+  
    
    Added:
    a Vibrato effect
@@ -157,6 +162,7 @@ void TC4_Handler()                                         // Interrupt Service
           coreArray[CORE1].lfoState++;
           if (coreArray[CORE1].lfoState % 2 == 0) {
             coreArray[CORE1].color = 0x00;
+            // coreArray[CORE1].hfTrill = 0;  // sync trill
           } else {
             coreArray[CORE1].color = 0xFF;
           }