44 lines
753 B
C
44 lines
753 B
C
enum { WAVE_OFF, WAVE_PULSE, WAVE_SAW, WAVE_NOISE };
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typedef struct {
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uint8_t note;
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uint8_t inst_nr;
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uint8_t pos;
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uint16_t phase;
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uint16_t pulse_width;
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uint8_t level; // envelop level
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} synth_channel_t;
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typedef struct {
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uint16_t pulse_width;
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uint8_t pulse_sweep;
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uint8_t decay;
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uint8_t wave_table_pos;
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} synth_instrument_t;
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uint16_t synth_mix(void);
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enum {
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channel_count = 3,
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tick_length = 400,
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row_length = 8,
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pattern_length = 16
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};
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extern synth_instrument_t instruments[256];
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extern uint8_t wave_table[256][2];
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extern uint8_t patterns[256][pattern_length][2];
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extern uint8_t pattern_table[256][channel_count];
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extern uint8_t tune_length;
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extern int16_t sample;
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extern int8_t tick;
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extern int8_t row;
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extern int8_t seq;
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