From 0edfe55bfe4afd037918ff73e49552a28f39a5ca Mon Sep 17 00:00:00 2001
From: Jack Humbert <jack.humb@gmail.com>
Date: Mon, 12 Dec 2016 15:39:07 -0500
Subject: [PATCH] re-enable audio and extrakeys

---
 keyboards/planck/keymaps/default/Makefile |  2 +-
 keyboards/preonic/rules.mk                |  6 +++---
 quantum/audio/voices.c                    | 23 ++++++++++++++++++++++-
 quantum/audio/voices.h                    |  1 +
 4 files changed, 27 insertions(+), 5 deletions(-)

diff --git a/keyboards/planck/keymaps/default/Makefile b/keyboards/planck/keymaps/default/Makefile
index 267a087e..17487ebb 100644
--- a/keyboards/planck/keymaps/default/Makefile
+++ b/keyboards/planck/keymaps/default/Makefile
@@ -10,7 +10,7 @@ EXTRAKEY_ENABLE = yes       # Audio control and System control(+450)
 CONSOLE_ENABLE = no         # Console for debug(+400)
 COMMAND_ENABLE = no        # Commands for debug and configuration
 NKRO_ENABLE = yes            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
-BACKLIGHT_ENABLE = yes      # Enable keyboard backlight functionality
+BACKLIGHT_ENABLE = no      # Enable keyboard backlight functionality
 MIDI_ENABLE = yes            # MIDI controls
 AUDIO_ENABLE = yes           # Audio output on port C6
 UNICODE_ENABLE = no         # Unicode
diff --git a/keyboards/preonic/rules.mk b/keyboards/preonic/rules.mk
index c4ce2aac..071bfdc7 100644
--- a/keyboards/preonic/rules.mk
+++ b/keyboards/preonic/rules.mk
@@ -56,11 +56,11 @@ BOOTMAGIC_ENABLE ?= no       # Virtual DIP switch configuration(+1000)
 MOUSEKEY_ENABLE ?= no       # Mouse keys(+4700)
 EXTRAKEY_ENABLE ?= yes       # Audio control and System control(+450)
 CONSOLE_ENABLE ?= no         # Console for debug(+400)
-COMMAND_ENABLE ?= yes        # Commands for debug and configuration
+COMMAND_ENABLE ?= no        # Commands for debug and configuration
 NKRO_ENABLE ?= no            # Nkey Rollover - if this doesn't work, see here: https://github.com/tmk/tmk_keyboard/wiki/FAQ#nkro-doesnt-work
 BACKLIGHT_ENABLE ?= yes      # Enable keyboard backlight functionality
-MIDI_ENABLE ?= no            # MIDI controls
-AUDIO_ENABLE ?= no           # Audio output on port C6
+MIDI_ENABLE ?= yes            # MIDI controls
+AUDIO_ENABLE ?= yes           # Audio output on port C6
 UNICODE_ENABLE ?= no         # Unicode
 BLUETOOTH_ENABLE ?= no       # Enable Bluetooth with the Adafruit EZ-Key HID
 RGBLIGHT_ENABLE ?= no        # Enable WS2812 RGB underlight.  Do not enable this with audio at the same time.
diff --git a/quantum/audio/voices.c b/quantum/audio/voices.c
index 6d4172a0..19f7b646 100644
--- a/quantum/audio/voices.c
+++ b/quantum/audio/voices.c
@@ -18,7 +18,7 @@ void voice_iterate() {
 }
 
 void voice_deiterate() {
-    voice = (voice - 1) % number_of_voices;
+    voice = (voice - 1 + number_of_voices) % number_of_voices;
 }
 
 float voice_envelope(float frequency) {
@@ -31,6 +31,27 @@ float voice_envelope(float frequency) {
             polyphony_rate = 0;
 	        break;
 
+        case something:
+            polyphony_rate = 0;
+            switch (compensated_index) {
+                case 0 ... 9:
+                    note_timbre = TIMBRE_12;
+                    break;
+
+                case 10 ... 19:
+                    note_timbre = TIMBRE_25;
+                    break;
+
+                case 20 ... 200:
+                    note_timbre = .25 + .125 + pow(((float)compensated_index - 20) / (200 - 20), 2)*.125;
+                    break;
+
+                default:
+                    note_timbre = .25;
+                    break;
+            }
+            break;
+
         case butts_fader:
             polyphony_rate = 0;
             switch (compensated_index) {
diff --git a/quantum/audio/voices.h b/quantum/audio/voices.h
index b2495b23..b43def3d 100644
--- a/quantum/audio/voices.h
+++ b/quantum/audio/voices.h
@@ -11,6 +11,7 @@ float voice_envelope(float frequency);
 
 typedef enum {
     default_voice,
+    something,
     butts_fader,
     octave_crunch,
     duty_osc,