10 files changed, 474 insertions, 162 deletions

diff --git a/quantum/audio/audio.c b/quantum/audio/audio.c
index ead5fbf3e..597073611 100644
--- a/quantum/audio/audio.c
+++ b/quantum/audio/audio.c
@@ -1,3 +1,18 @@
+/* Copyright 2016 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #include <stdio.h>
 #include <string.h>
 //#include <math.h>
@@ -77,6 +92,7 @@ static bool audio_initialized = false;
 audio_config_t audio_config;
 
 uint16_t envelope_index = 0;
+bool glissando = true;
 
 void audio_init()
 {
@@ -88,15 +104,15 @@ void audio_init()
     }
     audio_config.raw = eeconfig_read_audio();
 
-        // Set port PC6 (OC3A and /OC4A) as output
+    // Set port PC6 (OC3A and /OC4A) as output
     DDRC |= _BV(PORTC6);
 
     DISABLE_AUDIO_COUNTER_3_ISR;
 
-        // TCCR3A / TCCR3B: Timer/Counter #3 Control Registers
-        // Compare Output Mode (COM3An) = 0b00 = Normal port operation, OC3A disconnected from PC6
-        // Waveform Generation Mode (WGM3n) = 0b1110 = Fast PWM Mode 14 (Period = ICR3, Duty Cycle = OCR3A)
-        // Clock Select (CS3n) = 0b010 = Clock / 8
+    // TCCR3A / TCCR3B: Timer/Counter #3 Control Registers
+    // Compare Output Mode (COM3An) = 0b00 = Normal port operation, OC3A disconnected from PC6
+    // Waveform Generation Mode (WGM3n) = 0b1110 = Fast PWM Mode 14 (Period = ICR3, Duty Cycle = OCR3A)
+    // Clock Select (CS3n) = 0b010 = Clock / 8
     TCCR3A = (0 << COM3A1) | (0 << COM3A0) | (1 << WGM31) | (0 << WGM30);
     TCCR3B = (1 << WGM33)  | (1 << WGM32)  | (0 << CS32)  | (1 << CS31) | (0 << CS30);
 
@@ -105,6 +121,8 @@ void audio_init()
 
 void stop_all_notes()
 {
+    dprintf("audio stop all notes");
+
     if (!audio_initialized) {
         audio_init();
     }
@@ -127,6 +145,8 @@ void stop_all_notes()
 
 void stop_note(float freq)
 {
+    dprintf("audio stop note freq=%d", (int)freq);
+
     if (playing_note) {
         if (!audio_initialized) {
             audio_init();
@@ -182,155 +202,161 @@ float vibrato(float average_freq) {
 
 ISR(TIMER3_COMPA_vect)
 {
-        float freq;
-
-        if (playing_note) {
-                if (voices > 0) {
-                        if (polyphony_rate > 0) {
-                                if (voices > 1) {
-                                        voice_place %= voices;
-                                        if (place++ > (frequencies[voice_place] / polyphony_rate / CPU_PRESCALER)) {
-                                                voice_place = (voice_place + 1) % voices;
-                                                place = 0.0;
-                                        }
-                                }
-
-                                #ifdef VIBRATO_ENABLE
-                                        if (vibrato_strength > 0) {
-                                                freq = vibrato(frequencies[voice_place]);
-                                        } else {
-                                                freq = frequencies[voice_place];
-                                        }
-                                #else
-                                        freq = frequencies[voice_place];
-                                #endif
-                        } else {
-                                if (frequency != 0 && frequency < frequencies[voices - 1] && frequency < frequencies[voices - 1] * pow(2, -440/frequencies[voices - 1]/12/2)) {
-                                        frequency = frequency * pow(2, 440/frequency/12/2);
-                                } else if (frequency != 0 && frequency > frequencies[voices - 1] && frequency > frequencies[voices - 1] * pow(2, 440/frequencies[voices - 1]/12/2)) {
-                                        frequency = frequency * pow(2, -440/frequency/12/2);
-                                } else {
-                                        frequency = frequencies[voices - 1];
-                                }
-
-                                #ifdef VIBRATO_ENABLE
-                                        if (vibrato_strength > 0) {
-                                                freq = vibrato(frequency);
-                                        } else {
-                                                freq = frequency;
-                                        }
-                                #else
-                                        freq = frequency;
-                                #endif
-                        }
-
-                        if (envelope_index < 65535) {
-                                envelope_index++;
-                        }
-
-                        freq = voice_envelope(freq);
-
-                        if (freq < 30.517578125) {
-                                freq = 30.52;
-                        }
-
-                        TIMER_3_PERIOD = (uint16_t)(((float)F_CPU) / (freq * CPU_PRESCALER));
-                        TIMER_3_DUTY_CYCLE = (uint16_t)((((float)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre);
-                }
-        }
-
-        if (playing_notes) {
-                if (note_frequency > 0) {
-                        #ifdef VIBRATO_ENABLE
-                                if (vibrato_strength > 0) {
-                                        freq = vibrato(note_frequency);
-                                } else {
-                                        freq = note_frequency;
-                                }
-                        #else
-                                        freq = note_frequency;
-                        #endif
-
-                        if (envelope_index < 65535) {
-                                envelope_index++;
-                        }
-                        freq = voice_envelope(freq);
-
-                        TIMER_3_PERIOD = (uint16_t)(((float)F_CPU) / (freq * CPU_PRESCALER));
-                        TIMER_3_DUTY_CYCLE = (uint16_t)((((float)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre);
-                } else {
-                        TIMER_3_PERIOD = 0;
-                        TIMER_3_DUTY_CYCLE = 0;
-                }
-
-                note_position++;
-                bool end_of_note = false;
-                if (TIMER_3_PERIOD > 0) {
-                        end_of_note = (note_position >= (note_length / TIMER_3_PERIOD * 0xFFFF));
-                } else {
-                        end_of_note = (note_position >= (note_length * 0x7FF));
-                }
-
-                if (end_of_note) {
-                        current_note++;
-                        if (current_note >= notes_count) {
-                                if (notes_repeat) {
-                                        current_note = 0;
-                                } else {
-                                        DISABLE_AUDIO_COUNTER_3_ISR;
-                                        DISABLE_AUDIO_COUNTER_3_OUTPUT;
-                                        playing_notes = false;
-                                        return;
-                                }
-                        }
-                        if (!note_resting && (notes_rest > 0)) {
-                                note_resting = true;
-                                note_frequency = 0;
-                                note_length = notes_rest;
-                                current_note--;
-                        } else {
-                                note_resting = false;
-                                envelope_index = 0;
-                                note_frequency = (*notes_pointer)[current_note][0];
-                                note_length = ((*notes_pointer)[current_note][1] / 4) * (((float)note_tempo) / 100);
-                        }
-
-                        note_position = 0;
-                }
-        }
-
-        if (!audio_config.enable) {
-                playing_notes = false;
-                playing_note = false;
-        }
+    float freq;
+
+    if (playing_note) {
+        if (voices > 0) {
+            if (polyphony_rate > 0) {
+                if (voices > 1) {
+                    voice_place %= voices;
+                    if (place++ > (frequencies[voice_place] / polyphony_rate / CPU_PRESCALER)) {
+                        voice_place = (voice_place + 1) % voices;
+                        place = 0.0;
+                    }
+                }
+
+                #ifdef VIBRATO_ENABLE
+                    if (vibrato_strength > 0) {
+                        freq = vibrato(frequencies[voice_place]);
+                    } else {
+                        freq = frequencies[voice_place];
+                    }
+                #else
+                    freq = frequencies[voice_place];
+                #endif
+            } else {
+                if (glissando) {
+                    if (frequency != 0 && frequency < frequencies[voices - 1] && frequency < frequencies[voices - 1] * pow(2, -440/frequencies[voices - 1]/12/2)) {
+                        frequency = frequency * pow(2, 440/frequency/12/2);
+                    } else if (frequency != 0 && frequency > frequencies[voices - 1] && frequency > frequencies[voices - 1] * pow(2, 440/frequencies[voices - 1]/12/2)) {
+                        frequency = frequency * pow(2, -440/frequency/12/2);
+                    } else {
+                        frequency = frequencies[voices - 1];
+                    }
+                } else {
+                    frequency = frequencies[voices - 1];
+                }
+
+                #ifdef VIBRATO_ENABLE
+                    if (vibrato_strength > 0) {
+                        freq = vibrato(frequency);
+                    } else {
+                        freq = frequency;
+                    }
+                #else
+                    freq = frequency;
+                #endif
+            }
+
+            if (envelope_index < 65535) {
+                envelope_index++;
+            }
+
+            freq = voice_envelope(freq);
+
+            if (freq < 30.517578125) {
+                freq = 30.52;
+            }
+
+            TIMER_3_PERIOD = (uint16_t)(((float)F_CPU) / (freq * CPU_PRESCALER));
+            TIMER_3_DUTY_CYCLE = (uint16_t)((((float)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre);
+        }
+    }
+
+    if (playing_notes) {
+        if (note_frequency > 0) {
+            #ifdef VIBRATO_ENABLE
+                if (vibrato_strength > 0) {
+                    freq = vibrato(note_frequency);
+                } else {
+                    freq = note_frequency;
+                }
+            #else
+                    freq = note_frequency;
+            #endif
+
+            if (envelope_index < 65535) {
+                envelope_index++;
+            }
+            freq = voice_envelope(freq);
+
+            TIMER_3_PERIOD = (uint16_t)(((float)F_CPU) / (freq * CPU_PRESCALER));
+            TIMER_3_DUTY_CYCLE = (uint16_t)((((float)F_CPU) / (freq * CPU_PRESCALER)) * note_timbre);
+        } else {
+            TIMER_3_PERIOD = 0;
+            TIMER_3_DUTY_CYCLE = 0;
+        }
+
+        note_position++;
+        bool end_of_note = false;
+        if (TIMER_3_PERIOD > 0) {
+            end_of_note = (note_position >= (note_length / TIMER_3_PERIOD * 0xFFFF));
+        } else {
+            end_of_note = (note_position >= (note_length * 0x7FF));
+        }
+
+        if (end_of_note) {
+            current_note++;
+            if (current_note >= notes_count) {
+                if (notes_repeat) {
+                    current_note = 0;
+                } else {
+                    DISABLE_AUDIO_COUNTER_3_ISR;
+                    DISABLE_AUDIO_COUNTER_3_OUTPUT;
+                    playing_notes = false;
+                    return;
+                }
+            }
+            if (!note_resting && (notes_rest > 0)) {
+                note_resting = true;
+                note_frequency = 0;
+                note_length = notes_rest;
+                current_note--;
+            } else {
+                note_resting = false;
+                envelope_index = 0;
+                note_frequency = (*notes_pointer)[current_note][0];
+                note_length = ((*notes_pointer)[current_note][1] / 4) * (((float)note_tempo) / 100);
+            }
+
+            note_position = 0;
+        }
+    }
+
+    if (!audio_config.enable) {
+        playing_notes = false;
+        playing_note = false;
+    }
 }
 
 void play_note(float freq, int vol) {
 
+    dprintf("audio play note freq=%d vol=%d", (int)freq, vol);
+
     if (!audio_initialized) {
         audio_init();
     }
 
-        if (audio_config.enable && voices < 8) {
-            DISABLE_AUDIO_COUNTER_3_ISR;
+    if (audio_config.enable && voices < 8) {
+        DISABLE_AUDIO_COUNTER_3_ISR;
 
-            // Cancel notes if notes are playing
-            if (playing_notes)
-                stop_all_notes();
+        // Cancel notes if notes are playing
+        if (playing_notes)
+            stop_all_notes();
 
-            playing_note = true;
+        playing_note = true;
 
-            envelope_index = 0;
+        envelope_index = 0;
 
-            if (freq > 0) {
-                frequencies[voices] = freq;
-                volumes[voices] = vol;
-                voices++;
-            }
+        if (freq > 0) {
+            frequencies[voices] = freq;
+            volumes[voices] = vol;
+            voices++;
+        }
 
         ENABLE_AUDIO_COUNTER_3_ISR;
         ENABLE_AUDIO_COUNTER_3_OUTPUT;
-        }
+    }
 
 }
 
@@ -341,37 +367,37 @@ void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest)
         audio_init();
     }
 
-        if (audio_config.enable) {
+    if (audio_config.enable) {
 
-            DISABLE_AUDIO_COUNTER_3_ISR;
+        DISABLE_AUDIO_COUNTER_3_ISR;
 
-                // Cancel note if a note is playing
-            if (playing_note)
-                stop_all_notes();
+        // Cancel note if a note is playing
+        if (playing_note)
+            stop_all_notes();
 
-            playing_notes = true;
+        playing_notes = true;
 
-            notes_pointer = np;
-            notes_count = n_count;
-            notes_repeat = n_repeat;
-            notes_rest = n_rest;
+        notes_pointer = np;
+        notes_count = n_count;
+        notes_repeat = n_repeat;
+        notes_rest = n_rest;
 
-            place = 0;
-            current_note = 0;
+        place = 0;
+        current_note = 0;
 
         note_frequency = (*notes_pointer)[current_note][0];
         note_length = ((*notes_pointer)[current_note][1] / 4) * (((float)note_tempo) / 100);
-            note_position = 0;
+        note_position = 0;
 
 
         ENABLE_AUDIO_COUNTER_3_ISR;
         ENABLE_AUDIO_COUNTER_3_OUTPUT;
-        }
+    }
 
 }
 
 bool is_playing_notes(void) {
-        return playing_notes;
+    return playing_notes;
 }
 
 bool is_audio_on(void) {
diff --git a/quantum/audio/audio.h b/quantum/audio/audio.h
index 47f326ea0..27fdc2ab6 100644
--- a/quantum/audio/audio.h
+++ b/quantum/audio/audio.h
@@ -1,3 +1,18 @@
+/* Copyright 2016 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #ifndef AUDIO_H
 #define AUDIO_H
 
@@ -88,4 +103,4 @@ void play_notes(float (*np)[][2], uint16_t n_count, bool n_repeat, float n_rest)
 
 bool is_playing_notes(void);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/quantum/audio/audio_pwm.c b/quantum/audio/audio_pwm.c
index f820eec1b..ded86edee 100644
--- a/quantum/audio/audio_pwm.c
+++ b/quantum/audio/audio_pwm.c
@@ -1,3 +1,18 @@
+/* Copyright 2016 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #include <stdio.h>
 #include <string.h>
 //#include <math.h>
diff --git a/quantum/audio/luts.c b/quantum/audio/luts.c
index 9f3de9a05..57f2d5924 100644
--- a/quantum/audio/luts.c
+++ b/quantum/audio/luts.c
@@ -1,3 +1,19 @@
+/* Copyright 2016 IBNobody
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include <avr/io.h>
 #include <avr/interrupt.h>
 #include <avr/pgmspace.h>
diff --git a/quantum/audio/luts.h b/quantum/audio/luts.h
index 7df3078a7..155e34e88 100644
--- a/quantum/audio/luts.h
+++ b/quantum/audio/luts.h
@@ -1,3 +1,19 @@
+/* Copyright 2016 IBNobody
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include <avr/io.h>
 #include <avr/interrupt.h>
 #include <avr/pgmspace.h>
@@ -12,4 +28,4 @@
 extern const float vibrato_lut[VIBRATO_LUT_LENGTH];
 extern const uint16_t frequency_lut[FREQUENCY_LUT_LENGTH];
 
-#endif /* LUTS_H */
\ No newline at end of file
+#endif /* LUTS_H */
diff --git a/quantum/audio/musical_notes.h b/quantum/audio/musical_notes.h
index b08d16a6f..a3aaa2f19 100644
--- a/quantum/audio/musical_notes.h
+++ b/quantum/audio/musical_notes.h
@@ -1,3 +1,19 @@
+/* Copyright 2016 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #ifndef MUSICAL_NOTES_H
 #define MUSICAL_NOTES_H
 
@@ -214,4 +230,4 @@
 #define NOTE_BF8 NOTE_AS8
 
 
-#endif
\ No newline at end of file
+#endif
diff --git a/quantum/audio/song_list.h b/quantum/audio/song_list.h
index 623f24f32..db2d1a94c 100644
--- a/quantum/audio/song_list.h
+++ b/quantum/audio/song_list.h
@@ -1,3 +1,18 @@
+/* Copyright 2016 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #include "musical_notes.h"
 
 #ifndef SONG_LIST_H
@@ -134,4 +149,31 @@
     E__NOTE(_E6),     \
     S__NOTE(_B5),
 
+#define COIN_SOUND \
+    E__NOTE(_A5  ),      \
+    HD_NOTE(_E6  ),
+
+#define ONE_UP_SOUND \
+    Q__NOTE(_E6  ),  \
+    Q__NOTE(_G6  ),  \
+    Q__NOTE(_E7  ),  \
+    Q__NOTE(_C7  ),  \
+    Q__NOTE(_D7  ),  \
+    Q__NOTE(_G7  ),
+
+#define SONIC_RING \
+    E__NOTE(_E6),  \
+    E__NOTE(_G6),  \
+    HD_NOTE(_C7),
+
+#define ZELDA_PUZZLE \
+    Q__NOTE(_G5),     \
+    Q__NOTE(_FS5),    \
+    Q__NOTE(_DS5),     \
+    Q__NOTE(_A4),    \
+    Q__NOTE(_GS4),     \
+    Q__NOTE(_E5),     \
+    Q__NOTE(_GS5),     \
+    HD_NOTE(_C6),
+
 #endif
diff --git a/quantum/audio/voices.c b/quantum/audio/voices.c
index 6d4172a06..54ebd423b 100644
--- a/quantum/audio/voices.c
+++ b/quantum/audio/voices.c
@@ -1,3 +1,18 @@
+/* Copyright 2016 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #include "voices.h"
 #include "audio.h"
 #include "stdlib.h"
@@ -6,6 +21,7 @@
 extern uint16_t envelope_index;
 extern float note_timbre;
 extern float polyphony_rate;
+extern bool glissando;
 
 voice_type voice = default_voice;
 
@@ -18,20 +34,132 @@ 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) {
     // envelope_index ranges from 0 to 0xFFFF, which is preserved at 880.0 Hz
+    __attribute__ ((unused))
     uint16_t compensated_index = (uint16_t)((float)envelope_index * (880.0 / frequency));
 
     switch (voice) {
         case default_voice:
+            glissando = true;
             note_timbre = TIMBRE_50;
             polyphony_rate = 0;
                 break;
 
+    #ifdef AUDIO_VOICES
+
+        case something:
+            glissando = false;
+            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 = .125 + .125;
+                    break;
+
+                default:
+                    note_timbre = .125;
+                    break;
+            }
+            break;
+
+        case drums:
+            glissando = false;
+            polyphony_rate = 0;
+                // switch (compensated_index) {
+                //     case 0 ... 10:
+                //         note_timbre = 0.5;
+                //         break;
+                //     case 11 ... 20:
+                //         note_timbre = 0.5 * (21 - compensated_index) / 10;
+                //         break;
+                //     default:
+                //         note_timbre = 0;
+                //         break;
+                // }
+                // frequency = (rand() % (int)(frequency * 1.2 - frequency)) + (frequency * 0.8);
+
+            if (frequency < 80.0) {
+
+            } else if (frequency < 160.0) {
+
+                // Bass drum: 60 - 100 Hz
+                frequency = (rand() % (int)(40)) + 60;
+                switch (envelope_index) {
+                    case 0 ... 10:
+                        note_timbre = 0.5;
+                        break;
+                    case 11 ... 20:
+                        note_timbre = 0.5 * (21 - envelope_index) / 10;
+                        break;
+                    default:
+                        note_timbre = 0;
+                        break;
+                }
+
+            } else if (frequency < 320.0) {
+
+
+                // Snare drum: 1 - 2 KHz
+                frequency = (rand() % (int)(1000)) + 1000;
+                switch (envelope_index) {
+                    case 0 ... 5:
+                        note_timbre = 0.5;
+                        break;
+                    case 6 ... 20:
+                        note_timbre = 0.5 * (21 - envelope_index) / 15;
+                        break;
+                    default:
+                        note_timbre = 0;
+                        break;
+                }
+
+            } else if (frequency < 640.0) {
+
+                // Closed Hi-hat: 3 - 5 KHz
+                frequency = (rand() % (int)(2000)) + 3000;
+                switch (envelope_index) {
+                    case 0 ... 15:
+                        note_timbre = 0.5;
+                        break;
+                    case 16 ... 20:
+                        note_timbre = 0.5 * (21 - envelope_index) / 5;
+                        break;
+                    default:
+                        note_timbre = 0;
+                        break;
+                }
+
+            } else if (frequency < 1280.0) {
+
+                // Open Hi-hat: 3 - 5 KHz
+                frequency = (rand() % (int)(2000)) + 3000;
+                switch (envelope_index) {
+                    case 0 ... 35:
+                        note_timbre = 0.5;
+                        break;
+                    case 36 ... 50:
+                        note_timbre = 0.5 * (51 - envelope_index) / 15;
+                        break;
+                    default:
+                        note_timbre = 0;
+                        break;
+                }
+
+            }
+            break;
         case butts_fader:
+            glissando = true;
             polyphony_rate = 0;
             switch (compensated_index) {
                 case 0 ... 9:
@@ -79,6 +207,7 @@ float voice_envelope(float frequency) {
 
         case duty_osc:
             // This slows the loop down a substantial amount, so higher notes may freeze
+            glissando = true;
             polyphony_rate = 0;
             switch (compensated_index) {
                 default:
@@ -93,6 +222,7 @@ float voice_envelope(float frequency) {
                 break;
 
         case duty_octave_down:
+            glissando = true;
             polyphony_rate = 0;
             note_timbre = (envelope_index % 2) * .125 + .375 * 2;
             if ((envelope_index % 4) == 0)
@@ -101,6 +231,7 @@ float voice_envelope(float frequency) {
                 note_timbre = 0;
             break;
         case delayed_vibrato:
+            glissando = true;
             polyphony_rate = 0;
             note_timbre = TIMBRE_50;
             #define VOICE_VIBRATO_DELAY 150
@@ -155,11 +286,11 @@ float voice_envelope(float frequency) {
         //         note_timbre = 0.25;
         //     break;
 
+    #endif
+
                 default:
                         break;
     }
 
     return frequency;
 }
-
-
diff --git a/quantum/audio/voices.h b/quantum/audio/voices.h
index b2495b23b..9403a6b5e 100644
--- a/quantum/audio/voices.h
+++ b/quantum/audio/voices.h
@@ -1,3 +1,18 @@
+/* Copyright 2016 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 #include <stdint.h>
 #include <stdbool.h>
 #include <avr/io.h>
@@ -11,6 +26,9 @@ float voice_envelope(float frequency);
 
 typedef enum {
     default_voice,
+    #ifdef AUDIO_VOICES
+    something,
+    drums,
     butts_fader,
     octave_crunch,
     duty_osc,
@@ -21,6 +39,7 @@ typedef enum {
     // duty_fourth_down,
     // duty_third_down,
     // duty_fifth_third_down,
+    #endif
     number_of_voices // important that this is last
 } voice_type;
 
@@ -28,4 +47,4 @@ void set_voice(voice_type v);
 void voice_iterate(void);
 void voice_deiterate(void);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/quantum/audio/wave.h b/quantum/audio/wave.h
index 6ebc34851..f15615dd1 100644
--- a/quantum/audio/wave.h
+++ b/quantum/audio/wave.h
@@ -1,3 +1,19 @@
+/* Copyright 2016 Jack Humbert
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
 #include <avr/io.h>
 #include <avr/interrupt.h>
 #include <avr/pgmspace.h>
@@ -262,4 +278,4 @@ const uint8_t sinewave[] PROGMEM= //2048 values
 0x76,0x77,0x77,0x77,0x78,0x78,0x78,0x79,
 0x79,0x7a,0x7a,0x7a,0x7b,0x7b,0x7c,0x7c,
 0x7c,0x7d,0x7d,0x7e,0x7e,0x7e,0x7f,0x7f
-};
\ No newline at end of file
+};