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adds multiple voices and the ability to iterate/deiterate between them

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This commit is contained in:
Jack Humbert 2016-04-21 18:14:25 -04:00
parent a8fd65d86f
commit 9828aba2a1
3 changed files with 53 additions and 5 deletions
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21
keyboard/preonic/keymaps/default/keymap.c
View File

@ -3,7 +3,6 @@
#include "eeconfig.h"
#ifdef AUDIO_ENABLE
#include "audio.h"
#include "song_list.h"
#endif
// Each layer gets a name for readability, which is then used in the keymap matrix below.
@ -31,6 +30,8 @@
#endif
#define MUS_OFF M(8)
#define MUS_ON M(9)
#define VC_IN M(10)
#define VC_DE M(11)
// Fillers to make layering more clear
#define _______ KC_TRNS
@ -171,7 +172,7 @@ const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
{KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12},
{_______, RESET, _______, _______, _______, _______, _______, _______, _______, _______, _______, KC_DEL},
{_______, _______, _______, AUD_ON, AUD_OFF, AG_NORM, AG_SWAP, QWERTY, COLEMAK, DVORAK, _______, _______},
{_______, _______, _______, MUS_ON, MUS_OFF, _______, _______, _______, _______, _______, _______, _______},
{_______, VC_DE, VC_IN, MUS_ON, MUS_OFF, _______, _______, _______, _______, _______, _______, _______},
{_______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______}
}
@ -289,6 +290,22 @@ const macro_t *action_get_macro(keyrecord_t *record, uint8_t id, uint8_t opt)
#endif
}
break;
case 10:
if (record->event.pressed) {
#ifdef AUDIO_ENABLE
voice_iterate();
PLAY_NOTE_ARRAY(music_scale, false, 0);
#endif
}
break;
case 11:
if (record->event.pressed) {
#ifdef AUDIO_ENABLE
voice_deiterate();
PLAY_NOTE_ARRAY(music_scale, false, 0);
#endif
}
break;
}
return MACRO_NONE;
};

31
quantum/audio/voices.c
View File

@ -1,23 +1,35 @@
#include "voices.h"
// these are imported from audio.c
extern uint16_t envelope_index;
extern float note_timbre;
extern float polyphony_rate;
voice_type voice = default_voice;
voice_type voice = duty_osc;
void set_voice(voice_type v) {
voice = v;
}
void voice_iterate() {
voice = (voice + 1) % number_of_voices;
}
void voice_deiterate() {
voice = (voice - 1) % number_of_voices;
}
float voice_envelope(float frequency) {
// envelope_index ranges from 0 to 0xFFFF, which is preserved at 880.0 Hz
uint16_t compensated_index = (uint16_t)((float)envelope_index * (880.0 / frequency));
switch (voice) {
case default_voice:
// nothing here on purpose
note_timbre = TIMBRE_50;
polyphony_rate = 0;
break;
case butts_fader:
polyphony_rate = 0;
switch (compensated_index) {
case 0 ... 9:
frequency = frequency / 4;
@ -36,6 +48,7 @@ float voice_envelope(float frequency) {
}
break;
case octave_crunch:
polyphony_rate = 0;
switch (compensated_index) {
case 0 ... 9:
case 20 ... 24:
@ -54,6 +67,20 @@ float voice_envelope(float frequency) {
break;
}
break;
case duty_osc:
// This slows the loop down a substantial amount, so higher notes may freeze
polyphony_rate = 0;
switch (compensated_index) {
default:
#define SPEED 10
#define AMP .75
// sine wave is slow
// note_timbre = (sin((float)compensated_index/10000*SPEED) * AMP / 2) + .5;
// triangle wave is a bit faster
note_timbre = (float)abs((compensated_index*SPEED % 3000) - 1500) * ( AMP / 1500 ) + (1 - AMP) / 2;
break;
}
break;
}
return frequency;

6
quantum/audio/voices.h
View File

@ -13,9 +13,13 @@ float voice_envelope(float frequency);
typedef enum {
default_voice,
butts_fader,
octave_crunch
octave_crunch,
duty_osc,
number_of_voices // important that this is last
} voice_type;
void set_voice(voice_type v);
void voice_iterate();
void voice_deiterate();
#endif