diff options
Diffstat (limited to 'quantum/audio/voices.c')
| -rw-r--r-- | quantum/audio/voices.c | 137 |
1 files changed, 134 insertions, 3 deletions
diff --git a/quantum/audio/voices.c b/quantum/audio/voices.c index 6d4172a06c..54ebd423b1 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; } - - |