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@ -6,55 +6,55 @@ extern float note_timbre;
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voice_type voice = default_voice;
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void set_voice(voice_type v) {
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voice = v;
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voice = v;
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}
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float voice_envelope(float frequency) {
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// envelope_index ranges from 0 to 0xFFFF, which is preserved at 880.0 Hz
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// envelope_index ranges from 0 to 0xFFFF, which is preserved at 880.0 Hz
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uint16_t compensated_index = (uint16_t)((float)envelope_index * (880.0 / frequency));
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switch (voice) {
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case default_voice:
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// nothing here on purpose
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break;
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case butts_fader:
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switch (compensated_index) {
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case 0 ... 9:
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frequency = frequency / 4;
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note_timbre = TIMBRE_12;
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break;
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case 10 ... 19:
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frequency = frequency / 2;
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note_timbre = TIMBRE_12;
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break;
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case 20 ... 200:
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note_timbre = .125 - pow(((float)compensated_index - 20) / (200 - 20), 2)*.125;
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break;
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default:
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note_timbre = 0;
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break;
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}
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break;
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case octave_crunch:
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switch (compensated_index) {
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case 0 ... 9:
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case 20 ... 24:
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case 30 ... 32:
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frequency = frequency / 2;
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note_timbre = TIMBRE_12;
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break;
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case 10 ... 19:
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case 25 ... 29:
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case 33 ... 35:
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frequency = frequency * 2;
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note_timbre = TIMBRE_12;
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break;
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default:
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note_timbre = TIMBRE_12;
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break;
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}
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break;
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}
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case default_voice:
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// nothing here on purpose
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break;
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case butts_fader:
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switch (compensated_index) {
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case 0 ... 9:
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frequency = frequency / 4;
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note_timbre = TIMBRE_12;
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break;
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case 10 ... 19:
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frequency = frequency / 2;
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note_timbre = TIMBRE_12;
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break;
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case 20 ... 200:
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note_timbre = .125 - pow(((float)compensated_index - 20) / (200 - 20), 2)*.125;
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break;
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default:
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note_timbre = 0;
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break;
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}
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break;
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case octave_crunch:
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switch (compensated_index) {
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case 0 ... 9:
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case 20 ... 24:
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case 30 ... 32:
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frequency = frequency / 2;
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note_timbre = TIMBRE_12;
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break;
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case 10 ... 19:
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case 25 ... 29:
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case 33 ... 35:
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frequency = frequency * 2;
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note_timbre = TIMBRE_12;
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break;
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default:
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note_timbre = TIMBRE_12;
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break;
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}
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break;
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}
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return frequency;
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return frequency;
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}
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@ -11,9 +11,9 @@
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float voice_envelope(float frequency);
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typedef enum {
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default_voice,
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butts_fader,
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octave_crunch
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default_voice,
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butts_fader,
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octave_crunch
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} voice_type;
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void set_voice(voice_type v);
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