Macros
#define	FREQ_HZ(whole) (((whole) & 0xFFFFu) << 16)

#define	FREQ_HZ_FRAC(flhz) ((((uint32_t)(flhz)) << 16) \| ((uint32_t)(((flhz) - ((float)((uint32_t)(flhz)))) * 65536.0)))

#define	TOM(idx, len, noiseVol, sineVol, freq, done)

#define	DONUT_SAMPLE_RATE_HZ 8192

#define	SAMPLE_FACTOR (DAC_SAMPLE_RATE_HZ / DONUT_SAMPLE_RATE_HZ)

Functions
int8_t	defaultDrumkitFunc (percussionNote_t drum, uint32_t idx, bool done, uint32_t scratch[4], void data)
	Produces sounds for a standard drumkit according to the General MIDI standard.

int8_t	donutDrumkitFunc (percussionNote_t drum, uint32_t idx, bool done, uint32_t scratch[4], void data)
	Produces sounds for the drumkit that was included on the King Donut synth swadge.

Macro Definition Documentation

◆ FREQ_HZ

#define FREQ_HZ ( whole ) (((whole) & 0xFFFFu) << 16)

◆ FREQ_HZ_FRAC

#define FREQ_HZ_FRAC ( flhz ) ((((uint32_t)(flhz)) << 16) | ((uint32_t)(((flhz) - ((float)((uint32_t)(flhz)))) * 65536.0)))

◆ TOM

#define TOM	(	idx,
		len,
		noiseVol,
		sineVol,
		freq,
		done )

Value:

    adrLerp(idx, (len) / 2, (len) / 2, noiseVol, 0) * swSynthSampleWave(NOISE, idx & 0xFF) / 256 \
        + adrLerp(idx, 128, ((len)-128), sineVol, 0) * sampleWaveAt(idx, SHAPE_SINE, freq) / 256 \
        + finishAt(len, idx, done)

◆ DONUT_SAMPLE_RATE_HZ

#define DONUT_SAMPLE_RATE_HZ 8192

◆ SAMPLE_FACTOR

#define SAMPLE_FACTOR (DAC_SAMPLE_RATE_HZ / DONUT_SAMPLE_RATE_HZ)

Function Documentation

◆ defaultDrumkitFunc()

int8_t defaultDrumkitFunc	(	percussionNote_t	drum,
		uint32_t	idx,
		bool *	done,
		uint32_t	scratch[4],
		void *	data )

Produces sounds for a standard drumkit according to the General MIDI standard.

Parameters

drum	The MIDI note corresponding to the drum to play
idx	The sample index, which should start at 0 for each note and increase by one every sample
done	A pointer to a boolean which will be set to true when the drum is finished sounding
scratch	Not used by this drumkit
data	Not used by this drumkit

Returns: int8_t The signed 8-bit sample generated for this tick of the drumkit

◆ donutDrumkitFunc()

int8_t donutDrumkitFunc	(	percussionNote_t	drum,
		uint32_t	idx,
		bool *	done,
		uint32_t	scratch[4],
		void *	data )

Produces sounds for the drumkit that was included on the King Donut synth swadge.

This drumkit does not use the General MIDI drum note numbers