#define VOICE_OSCILLATORS 4
#define VOICE_FILTERS 2
#define NUM_LFO 4

enum {
	PAN_FIXED,
	PAN_OSC,
	PAN_LFO,
};

struct voice_param_t
{
	uint8_t pan_type;
	uint8_t pan_source;
	double pan_level;
	double pan_level_r;

	struct control_t shape;
	struct control_t level;
	struct control_t freq_mult;
	struct control_t phase;

	struct envelope_t env;
};

struct voice_t
{
	bool     playing;
	uint8_t  note;
	uint32_t sample;
	uint32_t released;

	double velocity;

	struct osc_t osc[VOICE_OSCILLATORS];

	//struct filter_t fil[VOICE_FILTERS];
	struct bw_filter_t bw[VOICE_FILTERS];
};

struct engine_t;

void voice_init(struct voice_t *voice, const struct engine_t *engine, double freq);
void voice_run(struct voice_t *voice, const struct engine_t *engine, uint32_t samples, float *left, float *right);