diff options
Diffstat (limited to 'quantum/audio/voices.c')
| -rw-r--r-- | quantum/audio/voices.c | 250 |
1 files changed, 117 insertions, 133 deletions
diff --git a/quantum/audio/voices.c b/quantum/audio/voices.c index 94147ccb66..53a65e4e37 100644 --- a/quantum/audio/voices.c +++ b/quantum/audio/voices.c @@ -19,40 +19,33 @@ // these are imported from audio.c extern uint16_t envelope_index; -extern float note_timbre; -extern float polyphony_rate; -extern bool glissando; +extern float note_timbre; +extern float polyphony_rate; +extern bool glissando; voice_type voice = default_voice; -void set_voice(voice_type v) { - voice = v; -} +void set_voice(voice_type v) { voice = v; } -void voice_iterate() { - voice = (voice + 1) % number_of_voices; -} +void voice_iterate() { voice = (voice + 1) % number_of_voices; } -void voice_deiterate() { - voice = (voice - 1 + number_of_voices) % number_of_voices; -} +void voice_deiterate() { 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)); + __attribute__((unused)) uint16_t compensated_index = (uint16_t)((float)envelope_index * (880.0 / frequency)); switch (voice) { case default_voice: - glissando = false; - note_timbre = TIMBRE_50; + glissando = false; + note_timbre = TIMBRE_50; polyphony_rate = 0; - break; + break; - #ifdef AUDIO_VOICES +#ifdef AUDIO_VOICES case something: - glissando = false; + glissando = false; polyphony_rate = 0; switch (compensated_index) { case 0 ... 9: @@ -74,25 +67,23 @@ float voice_envelope(float frequency) { break; case drums: - glissando = false; + 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); + // 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) { @@ -108,8 +99,6 @@ float voice_envelope(float frequency) { } } else if (frequency < 320.0) { - - // Snare drum: 1 - 2 KHz frequency = (rand() % (int)(1000)) + 1000; switch (envelope_index) { @@ -125,7 +114,6 @@ float voice_envelope(float frequency) { } } else if (frequency < 640.0) { - // Closed Hi-hat: 3 - 5 KHz frequency = (rand() % (int)(2000)) + 3000; switch (envelope_index) { @@ -141,7 +129,6 @@ float voice_envelope(float frequency) { } } else if (frequency < 1280.0) { - // Open Hi-hat: 3 - 5 KHz frequency = (rand() % (int)(2000)) + 3000; switch (envelope_index) { @@ -155,141 +142,138 @@ float voice_envelope(float frequency) { note_timbre = 0; break; } - } break; case butts_fader: - glissando = true; + glissando = true; polyphony_rate = 0; switch (compensated_index) { case 0 ... 9: - frequency = frequency / 4; + frequency = frequency / 4; note_timbre = TIMBRE_12; - break; + break; case 10 ... 19: - frequency = frequency / 2; + frequency = frequency / 2; note_timbre = TIMBRE_12; - break; + break; case 20 ... 200: - note_timbre = .125 - pow(((float)compensated_index - 20) / (200 - 20), 2)*.125; - break; + note_timbre = .125 - pow(((float)compensated_index - 20) / (200 - 20), 2) * .125; + break; default: note_timbre = 0; - break; + break; } - break; - - // case octave_crunch: - // polyphony_rate = 0; - // switch (compensated_index) { - // case 0 ... 9: - // case 20 ... 24: - // case 30 ... 32: - // frequency = frequency / 2; - // note_timbre = TIMBRE_12; - // break; - - // case 10 ... 19: - // case 25 ... 29: - // case 33 ... 35: - // frequency = frequency * 2; - // note_timbre = TIMBRE_12; - // break; + break; - // default: - // note_timbre = TIMBRE_12; - // break; - // } - // break; + // case octave_crunch: + // polyphony_rate = 0; + // switch (compensated_index) { + // case 0 ... 9: + // case 20 ... 24: + // case 30 ... 32: + // frequency = frequency / 2; + // note_timbre = TIMBRE_12; + // break; + + // case 10 ... 19: + // case 25 ... 29: + // case 33 ... 35: + // frequency = frequency * 2; + // note_timbre = TIMBRE_12; + // break; + + // default: + // note_timbre = TIMBRE_12; + // break; + // } + // break; case duty_osc: // This slows the loop down a substantial amount, so higher notes may freeze - glissando = true; + glissando = true; polyphony_rate = 0; switch (compensated_index) { default: - #define OCS_SPEED 10 - #define OCS_AMP .25 +# define OCS_SPEED 10 +# define OCS_AMP .25 // sine wave is slow // note_timbre = (sin((float)compensated_index/10000*OCS_SPEED) * OCS_AMP / 2) + .5; // triangle wave is a bit faster - note_timbre = (float)abs((compensated_index*OCS_SPEED % 3000) - 1500) * ( OCS_AMP / 1500 ) + (1 - OCS_AMP) / 2; - break; + note_timbre = (float)abs((compensated_index * OCS_SPEED % 3000) - 1500) * (OCS_AMP / 1500) + (1 - OCS_AMP) / 2; + break; } - break; + break; case duty_octave_down: - glissando = true; + glissando = true; polyphony_rate = 0; - note_timbre = (envelope_index % 2) * .125 + .375 * 2; - if ((envelope_index % 4) == 0) - note_timbre = 0.5; - if ((envelope_index % 8) == 0) - note_timbre = 0; + note_timbre = (envelope_index % 2) * .125 + .375 * 2; + if ((envelope_index % 4) == 0) note_timbre = 0.5; + if ((envelope_index % 8) == 0) note_timbre = 0; break; case delayed_vibrato: - glissando = true; + glissando = true; polyphony_rate = 0; - note_timbre = TIMBRE_50; - #define VOICE_VIBRATO_DELAY 150 - #define VOICE_VIBRATO_SPEED 50 + note_timbre = TIMBRE_50; +# define VOICE_VIBRATO_DELAY 150 +# define VOICE_VIBRATO_SPEED 50 switch (compensated_index) { case 0 ... VOICE_VIBRATO_DELAY: break; default: - frequency = frequency * vibrato_lut[(int)fmod((((float)compensated_index - (VOICE_VIBRATO_DELAY + 1))/1000*VOICE_VIBRATO_SPEED), VIBRATO_LUT_LENGTH)]; + frequency = frequency * vibrato_lut[(int)fmod((((float)compensated_index - (VOICE_VIBRATO_DELAY + 1)) / 1000 * VOICE_VIBRATO_SPEED), VIBRATO_LUT_LENGTH)]; break; } break; - // case delayed_vibrato_octave: - // polyphony_rate = 0; - // if ((envelope_index % 2) == 1) { - // note_timbre = 0.55; - // } else { - // note_timbre = 0.45; - // } - // #define VOICE_VIBRATO_DELAY 150 - // #define VOICE_VIBRATO_SPEED 50 - // switch (compensated_index) { - // case 0 ... VOICE_VIBRATO_DELAY: - // break; - // default: - // frequency = frequency * VIBRATO_LUT[(int)fmod((((float)compensated_index - (VOICE_VIBRATO_DELAY + 1))/1000*VOICE_VIBRATO_SPEED), VIBRATO_LUT_LENGTH)]; - // break; - // } - // break; - // case duty_fifth_down: - // note_timbre = 0.5; - // if ((envelope_index % 3) == 0) - // note_timbre = 0.75; - // break; - // case duty_fourth_down: - // note_timbre = 0.0; - // if ((envelope_index % 12) == 0) - // note_timbre = 0.75; - // if (((envelope_index % 12) % 4) != 1) - // note_timbre = 0.75; - // break; - // case duty_third_down: - // note_timbre = 0.5; - // if ((envelope_index % 5) == 0) - // note_timbre = 0.75; - // break; - // case duty_fifth_third_down: - // note_timbre = 0.5; - // if ((envelope_index % 5) == 0) - // note_timbre = 0.75; - // if ((envelope_index % 3) == 0) - // note_timbre = 0.25; - // break; - - #endif - - default: - break; + // case delayed_vibrato_octave: + // polyphony_rate = 0; + // if ((envelope_index % 2) == 1) { + // note_timbre = 0.55; + // } else { + // note_timbre = 0.45; + // } + // #define VOICE_VIBRATO_DELAY 150 + // #define VOICE_VIBRATO_SPEED 50 + // switch (compensated_index) { + // case 0 ... VOICE_VIBRATO_DELAY: + // break; + // default: + // frequency = frequency * VIBRATO_LUT[(int)fmod((((float)compensated_index - (VOICE_VIBRATO_DELAY + 1))/1000*VOICE_VIBRATO_SPEED), VIBRATO_LUT_LENGTH)]; + // break; + // } + // break; + // case duty_fifth_down: + // note_timbre = 0.5; + // if ((envelope_index % 3) == 0) + // note_timbre = 0.75; + // break; + // case duty_fourth_down: + // note_timbre = 0.0; + // if ((envelope_index % 12) == 0) + // note_timbre = 0.75; + // if (((envelope_index % 12) % 4) != 1) + // note_timbre = 0.75; + // break; + // case duty_third_down: + // note_timbre = 0.5; + // if ((envelope_index % 5) == 0) + // note_timbre = 0.75; + // break; + // case duty_fifth_third_down: + // note_timbre = 0.5; + // if ((envelope_index % 5) == 0) + // note_timbre = 0.75; + // if ((envelope_index % 3) == 0) + // note_timbre = 0.25; + // break; + +#endif + + default: + break; } return frequency; |