MicroDexed/config.h

/*
   MicroDexed

   MicroDexed is a port of the Dexed sound engine
   (https://github.com/asb2m10/dexed) for the Teensy-3.5/3.6/4.x with audio shield.
   Dexed ist heavily based on https://github.com/google/music-synthesizer-for-android

   (c)2018-2020 H. Wirtz <wirtz@parasitstudio.de>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA

*/

#ifndef CONFIG_H_INCLUDED
#define CONFIG_H_INCLUDED

#include <Arduino.h>
#include "midinotes.h"

// ATTENTION! For better latency you have to redefine AUDIO_BLOCK_SAMPLES from
// 128 to 64 in <ARDUINO-IDE-DIR>/cores/teensy3/AudioStream.h

// If you want to test the system with Linux and without any keyboard and/or audio equipment, you can do the following:
// 1. In Arduino-IDE enable "Tools->USB-Type->Serial + MIDI + Audio"
// 2. Build the firmware with "MIDI_DEVICE_USB" enabled in config.h.
// 3. Afterconnecting to a Linux system there should be a MIDI an audio device available that is called "MicroMDexed", so you can start the following:
// $ aplaymidi -p 20:0 <MIDI-File> # e.g. test.mid
// $ vkeybd --addr 20:0
// $ arecord -f cd -Dhw:1,0 /tmp/<AUDIO_FILE_NAME>.wav
//
// Tools for testing MIDI:  https://github.com/gbevin/SendMIDI
//                          https://github.com/gbevin/ReceiveMIDI
//
// e.g.:
// * sendmidi dev "MicroDexed MIDI" on 80 127 && sleep 1.0 && sendmidi dev "MicroDexed MIDI" off 80 0
// * sendmidi dev "MicroDexed MIDI" syf addon/SD/90/RitCh1.syx
// * amidi -p hw:2,0,0 -s addon/SD/90/RitCh1.syx
//
// Receiving and storing MIDI SYSEX with Linux:
// amidi -p hw:2,0,0 -d -r /tmp/bkup1.syx
//
// For SYSEX Bank upload via USB:
// sed -i.orig 's/SYSEX_MAX_LEN = 290/SYSEX_MAX_LEN = 4104/' /usr/local/arduino-teensy/hardware/teensy/avr/libraries/USBHost_t36/USBHost_t36.h
// sed -i.orig 's/^#define USB_MIDI_SYSEX_MAX 290/#define USB_MIDI_SYSEX_MAX 4104/' /usr/local/arduino-teensy/hardware/teensy/avr/cores/teensy3/usb_midi.h
//#define USB_MIDI_SYSEX_MAX 4104

#define VERSION "1.0.5"

//*************************************************************************************************
//* DEVICE SETTINGS
//*************************************************************************************************

//*************************************************************************************************
//* MIDI HARDWARE SETTINGS
//*************************************************************************************************
#define MIDI_DEVICE_DIN Serial1
#define MIDI_DEVICE_USB 1
#define MIDI_DEVICE_USB_HOST 1

//*************************************************************************************************
//* AUDIO HARDWARE SETTINGS
//*************************************************************************************************
// If nothing is defined Teensy internal DAC is used as audio output device!
// Left and right channel audio signal is presented on pins A21 and A22.
#define AUDIO_DEVICE_USB
#define TEENSY_AUDIO_BOARD
//#define PT8211_AUDIO
//#define TGA_AUDIO_BOARD
//#define TEENSY_DAC
//#define TEENSY_DAC_SYMMETRIC
//#define I2S_AUDIO_ONLY

//*************************************************************************************************
//* MIDI SOFTWARE SETTINGS
//*************************************************************************************************
#define DEFAULT_MIDI_CHANNEL MIDI_CHANNEL_OMNI
#define SYSEXBANK_DEFAULT 0
#define SYSEXSOUND_DEFAULT 0

//*************************************************************************************************
//* DEBUG OUTPUT SETTINGS
//*************************************************************************************************
//#define DEBUG 1
#define SERIAL_SPEED 230400
#define SHOW_XRUN 1
#define SHOW_CPU_LOAD_MSEC 5000

//*************************************************************************************************
//* DEXED AND EFECTS SETTINGS
//*************************************************************************************************
#define DEXED_ENGINE DEXED_ENGINE_MODERN // DEXED_ENGINE_MARKI // DEXED_ENGINE_OPL

// Number of Dexed instances
#define NUM_DEXED 1 // 1 or 2 - nothing else!
// FX-CHAIN ENABLE/DISABLE
#define USE_FX 1
// CHORUS parameters
#define MOD_DELAY_SAMPLE_BUFFER int32_t(TIME_MS2SAMPLES(20.0)) // 20.0 ms delay buffer. 
#define MOD_WAVEFORM WAVEFORM_TRIANGLE // WAVEFORM_SINE WAVEFORM_TRIANGLE WAVEFORM_SAWTOOTH WAVEFORM_SAWTOOTH_REVERSE
#define MOD_FILTER_OUTPUT MOD_BUTTERWORTH_FILTER_OUTPUT // MOD_LINKWITZ_RILEY_FILTER_OUTPUT MOD_BUTTERWORTH_FILTER_OUTPUT MOD_NO_FILTER_OUTPUT
#define MOD_FILTER_CUTOFF_HZ 2000
// REVERB parameters
#define REVERB_ANTIALIAS_FRQ 7500
// SGTL5000
#ifdef TEENSY_AUDIO_BOARD
#define SGTL5000_AUDIO_ENHANCE 1
#define SGTL5000_AUDIO_THRU 1
#define SGTL5000_HEADPHONE_VOLUME 0.8
#endif
//*************************************************************************************************
//* AUDIO SOFTWARE SETTINGS
//*************************************************************************************************
#ifndef TEENSY_AUDIO_BOARD
#if AUDIO_BLOCK_SAMPLES == 64
#define AUDIO_MEM 512
#else
#define AUDIO_MEM 384
#endif
#else // IF TEENSY_AUDIO_BOARD
/*
  13: 3.16 Volts p-p
  14: 2.98 Volts p-p
  15: 2.83 Volts p-p
  16: 2.67 Volts p-p
  17: 2.53 Volts p-p
  18: 2.39 Volts p-p
  19: 2.26 Volts p-p
  20: 2.14 Volts p-p
  21: 2.02 Volts p-p
  22: 1.91 Volts p-p
  23: 1.80 Volts p-p
  24: 1.71 Volts p-p
  25: 1.62 Volts p-p
  26: 1.53 Volts p-p
  27: 1.44 Volts p-p
  28: 1.37 Volts p-p
  29: 1.29 Volts p-p  (default)
  30: 1.22 Volts p-p
  31: 1.16 Volts p-p
*/
#define SGTL5000_LINEOUT_LEVEL 29
#if AUDIO_BLOCK_SAMPLES == 64
#define AUDIO_MEM 512
#else
#define AUDIO_MEM 384
#endif
#endif
#if NUM_DEXED > 1
#define DELAY_MAX_TIME 250
#else
#define DELAY_MAX_TIME 500
#endif
#define SAMPLE_RATE 44100

//*************************************************************************************************
//* UI
//*************************************************************************************************
#define ENABLE_LCD_UI 1
#define STANDARD_LCD_I2C
//#define OLED_SPI

// LCD Display
//I2C_DISPLAY only
#ifdef STANDARD_LCD_I2C
#define LCD_I2C_ADDRESS 0x27
//#define LCD_I2C_ADDRESS 0x3f
//Display size, must be set for U8X8 as well
#define LCD_cols  16
#define LCD_rows  2
#define I2C_DISPLAY
// [I2C] SCL: Pin 19, SDA: Pin 18 (https://www.pjrc.com/teensy/td_libs_Wire.html)
//#define LCD_GFX 1
#endif

#ifdef OLED_SPI
#define LCD_cols  16
#define LCD_rows  4
//enable U8X8 support
#define U8X8_DISPLAY
//enable SPI CS switching
#define DISPLAY_LCD_SPI
#define U8X8_DISPLAY_CLASS U8X8_SSD1322_NHD_256X64_4W_HW_SPI
//#define U8X8_DISPLAY_CLASS U8X8_SSD1306_128X64_NONAME_HW_I2C
#define U8X8_CS_PIN 9
#define U8X8_DC_PIN 15
#define U8X8_RESET_PIN 14
#endif

#define VOICE_SELECTION_MS 60000
#define BACK_FROM_VOLUME_MS 2000
#define MESSAGE_WAIT_TIME 1000
#define MIDI_DECAY_TIMER 50

//*************************************************************************************************
//* HARDWARE SETTINGS
//*************************************************************************************************

// Teensy Audio Shield
#define SDCARD_AUDIO_CS_PIN    10
#define SDCARD_AUDIO_MOSI_PIN  7
#define SDCARD_AUDIO_SCK_PIN   14
#ifndef TEENSY4
// Teensy 3.5 & 3.6 SD card
#define SDCARD_TEENSY_CS_PIN    BUILTIN_SDCARD
#define SDCARD_TEENSY_MOSI_PIN  11
#define SDCARD_TEENSY_SCK_PIN   13
#else
#define SDCARD_TEENSY_CS_PIN    10
#define SDCARD_TEENSY_MOSI_PIN  11
#define SDCARD_TEENSY_SCK_PIN   13
#endif

// Encoder with button
//#define ENCODER_USE_INTERRUPTS
#define NUM_ENCODER 2
#define ENC_L_PIN_A  3
#define ENC_L_PIN_B  2
#define BUT_L_PIN    4
#ifndef TEENSY4
#define ENC_R_PIN_A  28
#define ENC_R_PIN_B  29
#define BUT_R_PIN    30
#else
#define ENC_R_PIN_A  6
#define ENC_R_PIN_B  5
#define BUT_R_PIN    8
#endif
#define BUT_DEBOUNCE_MS 20
#define LONG_BUTTON_PRESS 500

// Internal timer
#define AUTOSTORE_MS 5000

// EEPROM address
#define EEPROM_START_ADDRESS 0xFF

#define MAX_BANKS 100
#define MAX_VOICES 32 // voices per bank
#define MAX_FX 99
#define MAX_PERFORMANCE 99
#define MAX_VOICECONFIG 99
#define BANK_NAME_LEN 11 // 10 (plus '\0')
#define VOICE_NAME_LEN 11 // 10 (plus '\0')
#define FILENAME_LEN BANK_NAME_LEN + VOICE_NAME_LEN

#define FX_CONFIG_PATH "FXCFG"
#define FX_CONFIG_NAME "FXCFG"
#define PERFORMANCE_CONFIG_PATH "PCFG"
#define PERFORMANCE_CONFIG_NAME "PCFG"
#define VOICE_CONFIG_PATH "VCFG"
#define VOICE_CONFIG_NAME "VCFG"

//*************************************************************************************************
//* DO NO CHANGE ANYTHING BEYOND IF YOU DON'T KNOW WHAT YOU ARE DOING !!!
//*************************************************************************************************
#define MAX_DEXED 2 // No! - even don't think about increasing this number! IT WILL PRODUCE MASSIVE PROBLEMS!
#define CONTROL_RATE_MS 50

#define EEPROM_MARKER 0x4242

// MIDI
#ifdef MIDI_DEVICE_USB
#define USBCON 1
#endif

// Teensy-4.x settings
#if defined(__IMXRT1062__) //Teensy-4.x
#define MAX_NOTES 16
#define TEENSY4
#endif

// Teensy-3.6 settings
#if defined(__MK66FX1M0__) // Teensy-3.6
#  define TEENSY3_6
# if defined(USE_FX)
#  if NUM_DEXED == 1
#   if F_CPU == 256000000
#    define MAX_NOTES 20
#   elif F_CPU == 216000000
#    define MAX_NOTES 16
#   else
#    warning >>> You should consider to use 216MHz overclocking to get polyphony of 16 instead 12 voices <<<
#    define MAX_NOTES 12
#   endif
#  else
#   if F_CPU == 256000000
#    define MAX_NOTES 9
#   elif F_CPU == 216000000
#    define MAX_NOTES 7
#   else
#    define MAX_NOTES 5
#   endif
#  endif
# else
#  if NUM_DEXED == 1
#   if F_CPU == 256000000
#    define MAX_NOTES 20
#   elif F_CPU == 216000000
#    define MAX_NOTES 20
#   else
#    define MAX_NOTES 16
#   endif
#  else
#   if F_CPU == 256000000
#    define MAX_NOTES 20
#   elif F_CPU == 216000000
#    define MAX_NOTES 16
#   else
#    define MAX_NOTES 8
#   endif
#  endif
# endif
#endif

#if defined (__MK64FX512__)
// Teensy-3.5 settings
#undef MIDI_DEVICE_USB_HOST
#define MAX_NOTES 11
#undef USE_FX
#define TEENSY3_5
#endif

#define TRANSPOSE_FIX 24
//#define VOICE_SILENCE_LEVEL 1069
#define VOICE_SILENCE_LEVEL 4000

// Audio
#ifdef TGA_AUDIO_BOARD
#endif

// Some optimizations
#define USE_TEENSY_DSP 1

// HELPER MACROS
#define TIME_MS2SAMPLES(x) floor(uint32_t(x) * AUDIO_SAMPLE_RATE / 1000)
#define SAMPLES2TIME_MS(x) float(uint32_t(x) * 1000 / AUDIO_SAMPLE_RATE)
// Modulated delay options
#define MOD_NO_FILTER_OUTPUT 0
#define MOD_BUTTERWORTH_FILTER_OUTPUT 1
#define MOD_LINKWITZ_RILEY_FILTER_OUTPUT 2

#if defined(TEENSY_DAC_SYMMETRIC)
#define MONO_MIN 1
#define MONO_MAX 1
#define MONO_DEFAULT 1
#else
#define MONO_MIN 0
#define MONO_MAX 3
#define MONO_DEFAULT 0
#endif

#define MIDI_CONTROLLER_MODE_MAX 2

#define VOLUME_MIN 0
#define VOLUME_MAX 100
#define VOLUME_DEFAULT 80
//#define VOLUME_ENC_STEPS 5

#define PANORAMA_MIN 0
#define PANORAMA_MAX 40
#define PANORAMA_DEFAULT 20

#define MIDI_CHANNEL_MIN MIDI_CHANNEL_OMNI
#define MIDI_CHANNEL_MAX 16
#define MIDI_CHANNEL_DEFAULT MIDI_CHANNEL_OMNI

#define INSTANCE_LOWEST_NOTE_MIN 21
#define INSTANCE_LOWEST_NOTE_MAX 108
#define INSTANCE_LOWEST_NOTE_DEFAULT 21

#define INSTANCE_HIGHEST_NOTE_MIN 21
#define INSTANCE_HIGHEST_NOTE_MAX 108
#define INSTANCE_HIGHEST_NOTE_DEFAULT 108

#define CHORUS_FREQUENCY_MIN 0
#define CHORUS_FREQUENCY_MAX 100
#define CHORUS_FREQUENCY_DEFAULT 0

#define CHORUS_WAVEFORM_MIN 0
#define CHORUS_WAVEFORM_MAX 1
#define CHORUS_WAVEFORM_DEFAULT 0

#define CHORUS_DEPTH_MIN 0
#define CHORUS_DEPTH_MAX 100
#define CHORUS_DEPTH_DEFAULT 0

#define CHORUS_LEVEL_MIN 0
#define CHORUS_LEVEL_MAX 100
#define CHORUS_LEVEL_DEFAULT 0

#define DELAY_TIME_MIN 0
#define DELAY_TIME_MAX DELAY_MAX_TIME/10
#define DELAY_TIME_DEFAULT 0

#define DELAY_FEEDBACK_MIN 0
#define DELAY_FEEDBACK_MAX 100
#define DELAY_FEEDBACK_DEFAULT 0

#define DELAY_LEVEL_MIN 0
#define DELAY_LEVEL_MAX 100
#define DELAY_LEVEL_DEFAULT 0

#define REVERB_ROOMSIZE_MIN 0
#define REVERB_ROOMSIZE_MAX 100
#define REVERB_ROOMSIZE_DEFAULT 0

#define REVERB_DAMPING_MIN 0
#define REVERB_DAMPING_MAX 100
#define REVERB_DAMPING_DEFAULT 0

#define REVERB_LEVEL_MIN 0
#define REVERB_LEVEL_MAX 100
#define REVERB_LEVEL_DEFAULT 0

#define REVERB_SEND_MIN 0
#define REVERB_SEND_MAX 100
#define REVERB_SEND_DEFAULT 0

#define FILTER_CUTOFF_MIN 0
#define FILTER_CUTOFF_MAX 100
#define FILTER_CUTOFF_DEFAULT 0

#define FILTER_RESONANCE_MIN 0
#define FILTER_RESONANCE_MAX 100
#define FILTER_RESONANCE_DEFAULT 0

#define TRANSPOSE_MIN 0
#define TRANSPOSE_MAX 48
#define TRANSPOSE_DEFAULT 12

#define TUNE_MIN 1
#define TUNE_MAX 199
#define TUNE_DEFAULT 100

#define SOUND_INTENSITY_MIN 0
#define SOUND_INTENSITY_MAX 127
#define SOUND_INTENSITY_DEFAULT 100
#define SOUND_INTENSITY_AMP_MAX 1.27

#define POLYPHONY_MIN 0
#define POLYPHONY_MAX MAX_NOTES
#define POLYPHONY_DEFAULT MAX_NOTES

#define ENGINE_MIN 0
#define ENGINE_MAX 2
#define ENGINE_DEFAULT 0

#define MONOPOLY_MIN 0
#define MONOPOLY_MAX 1
#define MONOPOLY_DEFAULT 0

#define NOTE_REFRESH_MIN 0
#define NOTE_REFRESH_MAX 1
#define NOTE_REFRESH_DEFAULT 0

#define PB_RANGE_MIN 0
#define PB_RANGE_MAX 12
#define PB_RANGE_DEFAULT 1

#define PB_STEP_MIN 0
#define PB_STEP_MAX 12
#define PB_STEP_DEFAULT 0

#define MW_RANGE_MIN 0
#define MW_RANGE_MAX 99
#define MW_RANGE_DEFAULT 50

#define MW_ASSIGN_MIN 0
#define MW_ASSIGN_MAX 7
#define MW_ASSIGN_DEFAULT 0 // Bitmapped: 0: Pitch, 1: Amp, 2: Bias

#define MW_MODE_MIN 0
#define MW_MODE_MAX MIDI_CONTROLLER_MODE_MAX
#define MW_MODE_DEFAULT 0

#define FC_RANGE_MIN 0
#define FC_RANGE_MAX 99
#define FC_RANGE_DEFAULT 50

#define FC_ASSIGN_MIN 0
#define FC_ASSIGN_MAX 7
#define FC_ASSIGN_DEFAULT 0 // Bitmapped: 0: Pitch, 1: Amp, 2: Bias

#define FC_MODE_MIN 0
#define FC_MODE_MAX MIDI_CONTROLLER_MODE_MAX
#define FC_MODE_DEFAULT 0

#define BC_RANGE_MIN 0
#define BC_RANGE_MAX 99
#define BC_RANGE_DEFAULT 50

#define BC_ASSIGN_MIN 0
#define BC_ASSIGN_MAX 7
#define BC_ASSIGN_DEFAULT 0 // Bitmapped: 0: Pitch, 1: Amp, 2: Bias

#define BC_MODE_MIN 0
#define BC_MODE_MAX MIDI_CONTROLLER_MODE_MAX
#define BC_MODE_DEFAULT 0

#define AT_RANGE_MIN 0
#define AT_RANGE_MAX 99
#define AT_RANGE_DEFAULT 50

#define AT_ASSIGN_MIN 0
#define AT_ASSIGN_MAX 7
#define AT_ASSIGN_DEFAULT 0 // Bitmapped: 0: Pitch, 1: Amp, 2: Bias

#define AT_MODE_MIN 0
#define AT_MODE_MAX MIDI_CONTROLLER_MODE_MAX
#define AT_MODE_DEFAULT 0

#define OP_ENABLED_MIN 0
#define OP_ENABLED_MAX 0x3f
#define OP_ENABLED_DEFAULT OP_ENABLED_MAX

#define PORTAMENTO_MODE_MIN 0
#define PORTAMENTO_MODE_MAX 1
#define PORTAMENTO_MODE_DEFAULT 0 // 0: Retain, 1: Follow

#define PORTAMENTO_GLISSANDO_MIN 0
#define PORTAMENTO_GLISSANDO_MAX 1
#define PORTAMENTO_GLISSANDO_DEFAULT 0

#define PORTAMENTO_TIME_MIN 0
#define PORTAMENTO_TIME_MAX 99
#define PORTAMENTO_TIME_DEFAULT 0

#define INSTANCES_MIN 1
#define INSTANCES_MAX NUM_DEXED
#define INSTANCES_DEFAULT 1

#define INSTANCE_NOTE_START_MIN MIDI_AIS0
#define INSTANCE_NOTE_START_MAX MIDI_B7
#define INSTANCE_NOTE_START_DEFAULT INSTANCE_NOTE_START_MIN

#define INSTANCE_NOTE_END_MIN MIDI_AIS0
#define INSTANCE_NOTE_END_MAX MIDI_B7
#define INSTANCE_NOTE_END_DEFAULT INSTANCE_NOTE_END_MAX

#define SOFT_MIDI_THRU_MIN 0
#define SOFT_MIDI_THRU_MAX 1
#define SOFT_MIDI_THRU_DEFAULT 1

#define VELOCITY_LEVEL_MIN 100
#define VELOCITY_LEVEL_MAX 127
#define VELOCITY_LEVEL_DEFAULT 100

#define PERFORMANCE_NUM_MIN 0
#define PERFORMANCE_NUM_MAX MAX_PERFORMANCE
#define PERFORMANCE_NUM_DEFAULT -1

#define FX_NUM_MIN 0
#define FX_NUM_MAX MAX_FX
#define FX_NUM_DEFAULT -1

#define VOICECONFIG_NUM_MIN 0
#define VOICECONFIG_NUM_MAX MAX_VOICECONFIG
#define VOICECONFIG_NUM_DEFAULT -1

#define EQ_BASS_MIN -10
#define EQ_BASS_MAX 10
#define EQ_BASS_DEFAULT 0

#define EQ_TREBLE_MIN -10
#define EQ_TREBLE_MAX 10
#define EQ_TREBLE_DEFAULT 0

//
typedef struct dexed_s {
  uint8_t lowest_note;
  uint8_t highest_note;
  uint8_t transpose;
  uint8_t tune;
  uint8_t sound_intensity;
  uint8_t pan;
  uint8_t polyphony;
  uint8_t velocity_level;
  uint8_t engine;
  uint8_t monopoly;
  uint8_t note_refresh;
  uint8_t pb_range;
  uint8_t pb_step;
  uint8_t mw_range;
  uint8_t mw_assign;
  uint8_t mw_mode;
  uint8_t fc_range;
  uint8_t fc_assign;
  uint8_t fc_mode;
  uint8_t bc_range;
  uint8_t bc_assign;
  uint8_t bc_mode;
  uint8_t at_range;
  uint8_t at_assign;
  uint8_t at_mode;
  uint8_t portamento_mode;
  uint8_t portamento_glissando;
  uint8_t portamento_time;
  uint8_t op_enabled;
  uint8_t midi_channel;
} dexed_t;

typedef struct fx_s {
  uint8_t filter_cutoff[MAX_DEXED];
  uint8_t filter_resonance[MAX_DEXED];
  uint8_t chorus_frequency[MAX_DEXED];
  uint8_t chorus_waveform[MAX_DEXED];
  uint8_t chorus_depth[MAX_DEXED];
  uint8_t chorus_level[MAX_DEXED];
  uint8_t delay_time[MAX_DEXED];
  uint8_t delay_feedback[MAX_DEXED];
  uint8_t delay_level[MAX_DEXED];
  uint8_t reverb_send[MAX_DEXED];
  uint8_t reverb_roomsize;
  uint8_t reverb_damping;
  uint8_t reverb_level;
  int8_t eq_bass;
  int8_t eq_treble;
} fx_t;

typedef struct performance_s {
  uint8_t bank[MAX_DEXED];
  uint8_t voice[MAX_DEXED];
  int8_t voiceconfig_number[MAX_DEXED];
  int8_t fx_number;
} performance_t;

typedef struct sys_s {
  uint8_t instances;
  uint8_t vol;
  uint8_t mono;
  uint8_t soft_midi_thru;
  int8_t performance_number;
} sys_t;

typedef struct configuration_s {
  sys_t sys;
  fx_t fx;
  performance_t performance;
  dexed_t dexed[MAX_DEXED];
  uint16_t _marker_;
} config_t;

#if !defined(_MAPFLOAT)
#define _MAPFLOAT
inline float mapfloat(float val, float in_min, float in_max, float out_min, float out_max)
{
  return (val - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
#endif

#endif // CONFIG_H_INCLUDED