Linear calibration parameters for V/Oct conversion. More...

#include <voct.hpp>

Collaboration diagram for sbl::components::cv::VoctCalibration:

Static Public Member Functions
static constexpr VoctCalibration	default_3v3 ()
	Default calibration for 0–3.3V input, 1V/Oct, 16-bit ADC.

static constexpr VoctCalibration	from_two_point (uint16_t adc_low, float note_low, uint16_t adc_high, float note_high)
	Compute calibration from two known points.

Public Attributes
float	scale
	Semitones per ADC unit.

float	offset
	MIDI note number at ADC=0.

Detailed Description

Linear calibration parameters for V/Oct conversion.

Maps smoothed ADC value to MIDI note number: note = adc_value * scale + offset

Definition at line 40 of file voct.hpp.

Member Function Documentation

◆ default_3v3()

static constexpr VoctCalibration sbl::components::cv::VoctCalibration::default_3v3 ( )

inlinestaticconstexpr

Default calibration for 0–3.3V input, 1V/Oct, 16-bit ADC.

3.3V × 12 semitones/V = 39.6 semitones across full ADC range. Base note C1 (MIDI 24) at ADC=0.

Definition at line 50 of file voct.hpp.

◆ from_two_point()

static constexpr VoctCalibration sbl::components::cv::VoctCalibration::from_two_point	(	uint16_t	adc_low,
		float	note_low,
		uint16_t	adc_high,
		float	note_high
	)

inlinestaticconstexpr

Compute calibration from two known points.

Apply known voltages, read the ADC values, and provide the expected MIDI note at each point. Scale and offset are derived from the two-point linear fit.

Parameters

adc_low	ADC reading at the low calibration voltage
note_low	Expected MIDI note at the low point
adc_high	ADC reading at the high calibration voltage
note_high	Expected MIDI note at the high point

Definition at line 66 of file voct.hpp.

Member Data Documentation

◆ offset

float sbl::components::cv::VoctCalibration::offset

MIDI note number at ADC=0.

Definition at line 42 of file voct.hpp.

Referenced by sbl::components::cv::VoctInput::semitones().

◆ scale

float sbl::components::cv::VoctCalibration::scale

Semitones per ADC unit.

Definition at line 41 of file voct.hpp.