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# Booker
Booker is Hammond Organ simulator complete with a Leslie. Booker is meant to run on the AE Modular GRAINS, but it could be adapted to any Arduino. Booker was written by Sean Luke [sean@cs.gmu.edu]
Set your Grains to **MOZZI MODE**. You will need to install the Mozzi Library. You can do this from the Library Manager in your Arduino IDE.
Booker comes with a Leslie, which is on by default, but you can turn it off in the code or change its rate, volume adjustment, and pitch adjustment.
## Adjusting Tuning and Tracking
Grains's Inputs track 1.3V/octave, not 1V/octave: we'll need to scale them to track properly. To do this, you can adjust the Pitch CV Scaling on Pot 1. This GRAINS program is set up to play the C three octaves below Middle C when it receives 0V. You should be able to use Pot 1 to scale the pitch such that high Cs play in tune as well. Once you have things tracking well, you can then use the Pitch Tune (Audio In) to tune 0V to some other note. Note that as GRAINS resistors warm up, the scaling will change and you will need to adjust the tracking again, at least until they are fully warmed up.
By default the note corresponding to 0V is C0, three octaves below middle C, that is MIDI note 24, or 32.7 Hz. You can customize the tuning for this Grains program but only UP. This can be done in two ways. First, you can add pitch to the tuning with a CV value to Audio In. Second, you can transpose the pitch up by changing the TRANSPOSE_OCTAVES and/or TRANSPOSE\_SEMITONES #defines in the code to positive integers. You can also change TRANSPOSE\_BITS: a "bit" is the minimum possible change Grains can do, equal to 1/17 of a semitone.
## Volume
Some drawbar settings are quiet and can get overwhelmed by noise, others are loud and can distort. You can compensate with the volume knob.
## Drawbar Settings
Booker also has 16 selections of drawbar settings, but in the code it comes with 98 total: just swap whatever you'd like in, or customize it as you see fit. The default settings are, in order:
885324588 Blues
888800000 Booker T. Jones 1
888630000 Booker T. Jones 2
878000456 Bright Comping
843000000 Dark Comping
888888888 Full Organ
808808008 Gospel 1
888000008 Gospel 2
868666568 Greg Allman 1
888600000 Greg Allman 2
886800300 Paul Shaffer 1
888768888 Paul Shaffer 2
888878678 Paul Shaffer 3
808000008 Reggae
080000000 Sweet
876543211 Strings
## Configuration
#### IN 1
Pitch CV
#### IN 2
Volume CV
#### IN 3
[UNUSED]
#### AUDIO IN (A)
Pitch Tune
#### AUDIO OUT
Out
#### DIGITAL OUT (D)
[UNUSED]
#### POT 1
Pitch Tune [Set the switch to IN1]
#### POT 2
Volume
#### POT 3
Choice of organ [Set the switch to MAN]

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// Copyright 2023 Sean Luke
// (sean@cs.gmu.edu)
//
// Released under the Apache 2.0 License
/// BOOKER
///
/// Booker is a Hammond Organ simulator, complete with Leslie. It is meant to run on the
/// AE Modular GRAINS, but it could be adapted to any Arduino.
///
/// SET GRAINS TO MOZZI MODE. Sorry, no Grains mode.
///
/// You will need to install the Mozzi Library. You can do this from the Library Manager
/// in your Arduino IDE.
///
/// ALIASING: At extremely high frequencies, a few of Booker's drawbars will go over Nyquist and
/// you may hear some antialiasing effects. I can fix this but it puts me over the
/// computational budget of the device, so it's not going to happen.
///
/// THE LESLIE. Booker comes with a Leslie, which is on by default:
#define LESLIE_ON // To turn this off, put a // before the #define, as in //#define
// Leslie changes both the amplitude and pitch at a certain rate.
// You can adjust them here
#define LESLIE_FREQUENCY 5.66 // This is the 450 speed. The classic slower speed is 0.66, but it's too slow
#define LESLIE_VOLUME 1 // Values are 0 (min but not gone), 1, 2, 3, 4, 5, 6 (max).
#define LESLIE_PITCH 128 // Values are 1.0 (lots) ... 128.0 or more (little). Can be floating point.
/// ADJUSTING TUNING AND TRACKING
///
/// Grains's Inputs track 1.3V/octave, not 1V/octave: we'll need to scale them to track properly.
/// To do this, you can adjust the Pitch CV Scaling on Pot 1. This GRAINS program is set up to play
/// the C three octaves below Middle C when it receives 0V. You should be able to use Pot 1 to scale
/// the pitch such that high Cs play in tune as well. Once you have things tracking well, you can
/// then use the Pitch Tune (Audio In) to tune 0V to some other note. Note that as GRAINS resistors
/// warm up, the scaling will change and you will need to adjust the tracking again, at least until
/// they are fully warmed up.
///
/// By default the note corresponding to 0V is C0, three octaves below middle C, that is MIDI note 24,
/// or 32.7 Hz. You can customize the tuning for this Grains program. This can be done
/// in two ways. First, you can add pitch to the tuning with a CV value to Audio In. Second, you
/// can transpose the pitch up by changing the TRANSPOSE_OCTAVES and/or TRANSPOSE_SEMITONES #defines
/// in the code to positive integers. You can also change TRANSPOSE_BITS: a "bit" is the minimum possible
/// change Grains can do, equal to 1/17 of a semitone.
///
/// CONFIGURATION
///
/// IN 1 Pitch CV
/// IN 2 Volume CV
/// IN 3 [Unused]
/// AUDIO IN (A) Pitch Tune
/// AUDIO OUT Out
/// DIGITAL OUT (D) [Unused]
///
/// POT 1 Pitch Scaling [Set the switch to In1]
///
/// POT 2 Volume
///
/// POT 3 Choice of Organ [Set the switch to MAN]
/// Lastly, here is our present drawbar selection. Keep this to no more than 31 but feel free
/// to change the selections. There is a big list of 99 selections below you could swap in.
#define NUM_DRAWBAR_SELECTIONS 16
uint8_t drawbars[NUM_DRAWBAR_SELECTIONS][9] =
{
{ 8, 8, 8, 8, 8, 8, 8, 8, 8 }, // 888888888 Full Organ
{ 8, 8, 5, 3, 2, 4, 5, 8, 8 }, // 885324588 Blues
{ 8, 8, 8, 8, 0, 0, 0, 0, 0 }, // 888800000 Booker T. Jones 1
{ 8, 8, 8, 6, 3, 0, 0, 0, 0 }, // 888630000 Booker T. Jones 2
{ 8, 7, 8, 0, 0, 0, 4, 5, 6 }, // 878000456 Bright Comping
{ 8, 4, 3, 0, 0, 0, 0, 0, 0 }, // 843000000 Dark Comping
{ 8, 0, 8, 8, 0, 8, 0, 0, 8 }, // 808808008 Gospel 1
{ 8, 8, 8, 0, 0, 0, 0, 0, 8 }, // 888000008 Gospel 2
{ 8, 6, 8, 6, 6, 6, 5, 6, 8 }, // 868666568 Greg Allman 1
{ 8, 8, 8, 6, 0, 0, 0, 0, 0 }, // 888600000 Greg Allman 2
{ 8, 8, 6, 8, 0, 0, 3, 0, 0 }, // 886800300 Paul Shaffer 1
{ 8, 8, 8, 7, 6, 8, 8, 8, 8 }, // 888768888 Paul Shaffer 2
{ 8, 8, 8, 8, 7, 8, 6, 7, 8 }, // 888878678 Paul Shaffer 3
{ 8, 0, 8, 0, 0, 0, 0, 0, 8 }, // 808000008 Reggae
{ 0, 8, 0, 0, 0, 0, 0, 0, 0 }, // 080000000 Sine
{ 8, 7, 6, 5, 4, 3, 2, 1, 1 }, // 876543211 Strings
};
/** Here is a collection of Drawbar Selections for you.
You can find more online.
{ 0, 0, 7, 7, 4, 0, 0, 3, 4 }, // 007740034 Alone in the City
{ 8, 8, 7, 7, 2, 4, 1, 1, 0 }, // 887724110 America (Gospel) (U)
{ 0, 0, 6, 6, 0, 6, 0, 0, 0 }, // 006606000 America (Gospel) (L)
{ 8, 8, 5, 3, 2, 4, 5, 8, 8 }, // 885324588 Blues
{ 8, 8, 8, 8, 0, 0, 0, 0, 0 }, // 888800000 Booker T. Jones 1
{ 8, 8, 8, 6, 3, 0, 0, 0, 0 }, // 888630000 Booker T. Jones 2
{ 8, 8, 8, 8, 0, 8, 0, 0, 8 }, // 888808008 Born to B3 (Gospel) (U)
{ 0, 0, 7, 7, 2, 5, 4, 0, 0 }, // 007725400 Born to B3 (Gospel) (L)
{ 8, 8, 8, 1, 1, 0, 0, 0, 0 }, // 888110000 Brian Auger 1
{ 8, 8, 8, 8, 0, 5, 0, 0, 0 }, // 888805000 Brian Auger 2
{ 8, 7, 8, 0, 0, 0, 4, 5, 6 }, // 878000456 Bright Comping
{ 8, 0, 0, 0, 0, 0, 8, 8, 8 }, // 800000888 Brother Jack
{ 8, 4, 3, 0, 0, 0, 0, 0, 0 }, // 843000000 Dark Comping
{ 8, 8, 8, 8, 8, 8, 8, 8, 8 }, // 888888888 Dark Solo A (U)
{ 6, 6, 2, 0, 0, 0, 0, 0, 0 }, // 662000000 Dark Solo A (L)
{ 8, 2, 8, 2, 0, 0, 0, 0, 2 }, // 828200002 Dark Solo B (U)
{ 6, 0, 6, 0, 0, 0, 0, 0, 0 }, // 606000000 Dark Solo B (L)
{ 8, 8, 8, 0, 0, 0, 8, 8, 8 }, // 888000888 Fat
{ 0, 8, 0, 0, 8, 0, 8, 8, 3 }, // 080080883 Fifth Organ (Gospel) (U)
{ 0, 0, 8, 8, 0, 6, 0, 0, 0 }, // 008806000 Fifth Organ (Gospel) (L)
{ 0, 0, 6, 8, 0, 2, 0, 0, 0 }, // 006802000 Flutes
{ 8, 8, 8, 6, 6, 6, 8, 8, 8 }, // 888666888 Full and High
{ 8, 6, 8, 8, 6, 8, 0, 6, 8 }, // 868868068 Full and Sweet
{ 8, 8, 8, 8, 8, 8, 8, 8, 8 }, // 888888888 Full Organ
{ 6, 8, 8, 6, 0, 0, 0, 0, 4 }, // 688600004 Funky Comping
{ 8, 8, 8, 8, 0, 0, 0, 0, 0 }, // 888800000 Gimme Some Loving
{ 8, 0, 8, 8, 0, 8, 0, 0, 8 }, // 808808008 Gospel 1
{ 8, 8, 8, 0, 0, 0, 0, 0, 8 }, // 888000008 Gospel 2
{ 8, 6, 8, 6, 6, 6, 5, 6, 8 }, // 868666568 Greg Allman 1
{ 8, 8, 8, 6, 0, 0, 0, 0, 0 }, // 888600000 Greg Allman 2
{ 8, 8, 6, 0, 0, 0, 0, 4, 0 }, // 886000040 Greg Allman 3
{ 8, 8, 8, 8, 0, 0, 0, 8, 8 }, // 888800088 Greg Rolie 1
{ 8, 8, 6, 4, 0, 0, 0, 0, 0 }, // 886400000 Greg Rolie 2
{ 8, 8, 8, 8, 8, 6, 6, 6, 6 }, // 888886666 Greg Rolie 4
{ 8, 8, 8, 4, 2, 0, 0, 8, 0 }, // 888420080 Groove Holmes (Gospel) (U)
{ 0, 0, 0, 5, 0, 5, 0, 0, 0 }, // 000505000 Groove Holmes (Gospel) (L)
{ 8, 8, 0, 0, 0, 0, 0, 0, 0 }, // 880000000 House Bass (Gospel) (U)
{ 0, 0, 8, 0, 8, 0, 0, 0, 0 }, // 008080000 House Bass (Gospel) (L)
{ 8, 6, 8, 6, 0, 0, 0, 0, 6 }, // 868600006 Jimmy McGriff 1
{ 8, 8, 3, 2, 0, 0, 1, 2, 5 }, // 883200125 Jimmy McGriff 2 (Gospel) (U)
{ 4, 4, 8, 6, 5, 0, 0, 0, 0 }, // 448650000 Jimmy McGriff 2 (Gospel) (L)
{ 8, 8, 8, 8, 8, 8, 8, 8, 8 }, // 888888888 Jimmy Smith 1 (U)
{ 0, 0, 7, 5, 0, 0, 0, 0, 0 }, // 007500000 Jimmy Smith 1 (L)
{ 8, 8, 8, 0, 0, 0, 0, 0, 0 }, // 888000000 Jimmy Smith 2 (U)
{ 8, 3, 8, 0, 0, 0, 0, 0, 0 }, // 838000000 Jimmy Smith 2 (L)
{ 8, 8, 8, 0, 0, 0, 0, 0, 0 }, // 888000000 Jimmy Smith 3 (U)
{ 8, 0, 8, 0, 0, 0, 0, 0, 0 }, // 808000000 Jimmy Smith 3 (L)
{ 8, 8, 8, 4, 0, 0, 0, 8, 0 }, // 888400080 Joey DeFrancesco
{ 8, 8, 4, 4, 0, 0, 0, 0, 0 }, // 884400000 Jon Lord
{ 8, 8, 0, 0, 6, 0, 0, 0, 0 }, // 880060000 Latin (Gospel) (U)
{ 0, 0, 6, 6, 7, 6, 0, 0, 0 }, // 006676000 Latin (Gospel) (L)
{ 8, 0, 0, 8, 0, 8, 0, 0, 0 }, // 800808000 Matthew Fisher
{ 8, 6, 8, 8, 0, 0, 0, 0, 4 }, // 868800004 Melvin Crispel
{ 8, 0, 3, 6, 0, 0, 0, 0, 0 }, // 803600000 Mellow
{ 0, 0, 7, 8, 0, 0, 4, 5, 3 }, // 007800453 Meditation Time (Gospel) (U)
{ 0, 0, 6, 7, 0, 0, 5, 4, 0 }, // 006700540 Meditation Time (Gospel) (L)
{ 8, 8, 6, 8, 0, 0, 3, 0, 0 }, // 886800300 Paul Shaffer 1
{ 8, 8, 8, 7, 6, 8, 8, 8, 8 }, // 888768888 Paul Shaffer 2
{ 8, 8, 8, 8, 7, 8, 6, 7, 8 }, // 888878678 Paul Shaffer 3
{ 8, 5, 0, 0, 0, 5, 0, 0, 0 }, // 850005000 Pink Floyd
{ 8, 8, 8, 8, 0, 0, 0, 0, 0 }, // 888800000 Power Chords
{ 8, 8, 8, 8, 0, 0, 0, 0, 0 }, // 888800000 Progessive (Gospel) (U)
{ 0, 0, 8, 8, 8, 4, 0, 0, 0 }, // 008884000 Progessive (Gospel) (L)
{ 0, 0, 6, 8, 7, 6, 4, 0, 0 }, // 006876400 Ray Charles
{ 8, 0, 8, 0, 0, 0, 0, 0, 8 }, // 808000008 Reggae
{ 8, 8, 8, 8, 0, 0, 0, 0, 0 }, // 888800000 Rock, R&B (U)
{ 8, 4, 8, 0, 0, 0, 0, 0, 0 }, // 848000000 Rock, R&B (L)
{ 8, 0, 0, 3, 8, 8, 8, 8, 8 }, // 800388888 Screaming (Gospel) (U)
{ 0, 0, 7, 0, 3, 3, 3, 3, 3 }, // 007033333 Screaming (Gospel) (L)
{ 0, 0, 8, 8, 8, 8, 8, 0, 0 }, // 008888800 Shirley Scott
{ 8, 3, 0, 0, 0, 0, 3, 7, 8 }, // 830000378 Simmering
{ 0, 8, 0, 0, 0, 0, 0, 0, 0 }, // 080000000 Sine
{ 8, 7, 6, 5, 5, 6, 7, 8, 8 }, // 876556788 Shouting 1
{ 6, 6, 8, 8, 4, 8, 5, 8, 8 }, // 668848588 Shouting 2
{ 8, 7, 8, 6, 4, 5, 4, 6, 6 }, // 878645466 Shouting 3 (Gospel) (U)
{ 8, 8, 8, 8, 0, 0, 0, 0, 0 }, // 888800000 Shouting 3 (Gospel) (L)
{ 0, 0, 8, 4, 0, 0, 0, 0, 0 }, // 008400000 Slow Balllad
{ 0, 6, 8, 8, 4, 0, 0, 0, 3 }, // 068840003 Slowly
{ 8, 8, 8, 7, 0, 0, 0, 0, 0 }, // 888700000 Soft Backing (Gospel) (U)
{ 5, 5, 5, 4, 0, 0, 0, 0, 0 }, // 555400000 Soft Backing (Gospel) (L)
{ 8, 0, 8, 4, 0, 0, 0, 0, 8 }, // 808400008 Soft Chords
{ 6, 7, 8, 4, 0, 4, 2, 3, 1 }, // 678404231 Speaker Talking (Gospel) (U)
{ 0, 0, 6, 6, 0, 2, 0, 2, 4 }, // 006602024 Speaker Talking (Gospel) (L)
{ 8, 8, 8, 6, 4, 3, 2, 0, 0 }, // 888643200 Steppenwolf
{ 8, 8, 8, 8, 7, 6, 7, 8, 8 }, // 888876788 Steve Winwood
{ 8, 7, 6, 5, 4, 3, 2, 1, 1 }, // 876543211 Strings
{ 0, 0, 8, 0, 0, 0, 0, 0, 0 }, // 008000000 Sweet
{ 7, 8, 7, 7, 4, 6, 0, 4, 6 }, // 787746046 Testimony Service (Gospel) (U)
{ 0, 0, 8, 8, 0, 0, 6, 7, 3 }, // 008800673 Testimony Service (Gospel) (L)
{ 8, 7, 8, 6, 5, 6, 4, 6, 7 }, // 878656467 Theatre Organ (Gospel) (U)
{ 0, 0, 8, 8, 4, 4, 0, 0, 0 }, // 008844000 Theatre Organ (Gospel) (L)
{ 8, 8, 8, 8, 0, 0, 0, 0, 0 }, // 888800000 Tom Coster
{ 8, 0, 0, 0, 0, 0, 0, 0, 8 }, // 800000008 Whistle 1
{ 8, 8, 8, 0, 0, 0, 0, 0, 8 }, // 888000008 Whistle 2
{ 6, 8, 8, 6, 0, 0, 0, 0, 0 }, // 688600000 Whiter Shade Of Pale 1 (U)
{ 8, 8, 0, 0, 7, 0, 7, 7, 0 }, // 880070770 Whiter Shade Of Pale 1 (L)
{ 8, 8, 8, 8, 0, 8, 0, 0, 6 }, // 888808006 Whiter Shade Of Pale 2 (U)
{ 0, 0, 4, 4, 4, 0, 0, 0, 0 }, // 004440000 Whiter Shade Of Pale 2 (L)
{ 8, 6, 6, 8, 0, 0, 0, 0, 0 }, // 866800000 Wide Leslie
*/
PROGMEM const float frequencies[1024+512] = {
32.7, 32.81097, 32.922318, 33.034042, 33.146145, 33.25863, 33.37149, 33.48474, 33.59837, 33.71239, 33.826794, 33.94159, 34.056774, 34.172344, 34.28831, 34.40467,
34.521423, 34.638577, 34.756123, 34.87407, 34.992416, 35.111168, 35.23032, 35.349876, 35.469837, 35.590206, 35.710987, 35.832172, 35.95377, 36.075783, 36.198208, 36.32105,
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4789.783, 4806.038, 4822.3477, 4838.7124, 4855.133, 4871.609, 4888.141, 4904.729, 4921.3735, 4938.0747, 4954.8325, 4971.647, 4988.5186, 5005.4473, 5022.4336, 5039.4775,
5056.5796, 5073.7393, 5090.957, 5108.2334, 5125.569, 5142.963, 5160.4155, 5177.9277, 5195.4995, 5213.131, 5230.822, 5248.5728, 5266.3843, 5284.256, 5302.1885, 5320.1816,
5338.2363, 5356.3516, 5374.529, 5392.7676, 5411.0684, 5429.431, 5447.8564, 5466.3438, 5484.894, 5503.5073, 5522.184, 5540.924, 5559.7275, 5578.5947, 5597.526, 5616.5215,
5635.5815, 5654.706, 5673.8955, 5693.151, 5712.4707, 5731.856, 5751.3076, 5770.825, 5790.4087, 5810.0586, 5829.7754, 5849.5596, 5869.41, 5889.328, 5909.314, 5929.368,
};
#define FREQUENCY(pitch) pgm_read_float_near(&frequencies[pitch])
#define CONTROL_RATE 128 // More than this and we're gonna get clicks probably
#include <MozziGuts.h>
#include <Oscil.h>
#include <tables/sin256_int8.h>
#include <tables/sin1024_int8.h>
/// OSCILLATORS
Oscil<SIN1024_NUM_CELLS, AUDIO_RATE> tonewheel1(SIN1024_DATA);
Oscil<SIN1024_NUM_CELLS, AUDIO_RATE> tonewheel2(SIN1024_DATA);
Oscil<SIN1024_NUM_CELLS, AUDIO_RATE> tonewheel3(SIN1024_DATA);
Oscil<SIN1024_NUM_CELLS, AUDIO_RATE> tonewheel4(SIN1024_DATA);
Oscil<SIN1024_NUM_CELLS, AUDIO_RATE> tonewheel5(SIN1024_DATA);
Oscil<SIN1024_NUM_CELLS, AUDIO_RATE> tonewheel6(SIN1024_DATA);
Oscil<SIN1024_NUM_CELLS, AUDIO_RATE> tonewheel7(SIN1024_DATA);
Oscil<SIN1024_NUM_CELLS, AUDIO_RATE> tonewheel8(SIN1024_DATA);
Oscil<SIN1024_NUM_CELLS, AUDIO_RATE> tonewheel9(SIN1024_DATA);
Oscil<SIN1024_NUM_CELLS, AUDIO_RATE> oscils[9] =
{
tonewheel1, tonewheel2, tonewheel3,
tonewheel4, tonewheel5, tonewheel6,
tonewheel7, tonewheel8, tonewheel9
};
#ifdef LESLIE_ON
Oscil<SIN256_NUM_CELLS, CONTROL_RATE> leslie(SIN256_DATA); // Leslie LFO
#endif
//float drawbarFrequencies[9] = { 0.5, 1.0, 1.5, 2.0, 3.0, 4.0, 5.0, 6.0, 8.0 };
uint8_t drawbarFrequencies[9] = { 1, 2, 3, 4, 6, 8, 10, 12, 16 };
// These are the amplitudes of each of the drawbar stop positions (0...8).
// Each additional stop increases by 3db. I think I have this right? Not sure.
// We are int8_t, not uin8_t, so we can multiply faster against oscils, which is
// also int8_t.
int8_t drawBarAmplitudes[9] =
{
0, 7, 18, 32, 48, 65, 85, 105, 127
};
#define CV_POT_IN1 A7 // Note in, Pitch Scaling
#define CV_POT_IN2 A6 // Gain
#define CV_POT3 A4 // Organ Selection
#define CV_IN3 A2 // [Unused]
#define CV_AUDIO_IN A0 // Pitch Tune
#define CV_AUDIO_OUT 9 // Out
#define CV_GATE_OUT 10 // [Unused]
#define MEDIAN_OF_THREE(a,b,c) (((a) <= (b)) ? (((b) <= (c)) ? (b) : (((a) < (c)) ? (c) : (a))) : (((a) <= (c)) ? (a) : (((b) < (c)) ? (c) : (b))))
uint16_t pitchCV;
uint16_t tuneCV;
uint16_t pA;
uint16_t pB;
void initializeFrequency(uint8_t pitch, uint8_t tune)
{
pitchCV = mozziAnalogRead(pitch);
tuneCV = mozziAnalogRead(tune);
}
#define TRANSPOSE_BITS 0
#define TRANSPOSE_SEMITONES 0
#define TRANSPOSE_OCTAVES 0
#define LARGE_JUMP 32
#define SEMITONE 17
#define FREQ_COUNTER_MAX 4
uint8_t freqCounter = 0;
inline float getFrequency(uint8_t pitch, uint8_t tune)
{
tuneCV = (tuneCV * 15 + mozziAnalogRead(tune)) >> 4;
uint16_t p = mozziAnalogRead(pitch);
uint16_t diff = (p > pitchCV ? p - pitchCV : pitchCV - p);
if (diff >= LARGE_JUMP)
{
pitchCV = p; // jump right there
freqCounter = FREQ_COUNTER_MAX;
}
else if (freqCounter > 0)
{
freqCounter--;
pitchCV = (pitchCV + p) >> 1;
pB = pA;
pA = pitchCV;
}
else
{
uint16_t p1 = MEDIAN_OF_THREE(p, pA, pB);
pB = pA;
pA = p;
pitchCV = (pitchCV * 7 + p1) >> 3;
}
int16_t finalPitch = pitchCV + (tuneCV >> 1) + TRANSPOSE_SEMITONES * 17 + TRANSPOSE_OCTAVES * 205 + TRANSPOSE_BITS;
return FREQUENCY(finalPitch < 0 ? 0 : (finalPitch > 1535 ? 1535 : finalPitch));
}
void setup()
{
startMozzi();
// Fire up the leslie
#ifdef LESLIE_ON
leslie.setFreq((float)LESLIE_FREQUENCY);
#endif
// precompute the drawbars so we don't have to compute them during updateAudio()
for(uint8_t i = 0; i < NUM_DRAWBAR_SELECTIONS; i++)
{
for(uint8_t j = 0; j < 9; j++)
{
drawbars[i][j] = drawBarAmplitudes[drawbars[i][j]];
}
}
initializeFrequency(CV_POT_IN1, CV_AUDIO_IN);
}
void loop()
{
audioHook();
}
// Median-Of-Three Filter for Pitch, dunno if we need it
uint16_t inA = 0;
uint16_t inB = 0;
uint8_t organ = 0; // Current index into the drawbars array
uint16_t gain; // our current gain
#define COUNTER_MAX 4
uint16_t counter =0;
void updateControl()
{
float frequency = getFrequency(CV_POT_IN1, CV_AUDIO_IN);
// leslie!
#ifdef LESLIE_ON
int8_t les = leslie.next();
frequency += les * (1.0 / LESLIE_PITCH);
#endif
// set the drawbars
for(uint8_t i = 0; i < 9; i++)
{
oscils[i].setFreq((frequency * drawbarFrequencies[i]));
}
// determine the gain
gain = 1 + (mozziAnalogRead(CV_POT_IN2) >> 2) // Gain (Volume)
#ifdef LESLIE_ON
#if LESLIE_VOLUME==0
#else
+ ((les + 128) >> (8 - (LESLIE_VOLUME - 1))); // note: >> 8 still goes between -1 and 0 depending on whether it's positive or negative initially
#endif
#endif
;
// what organ are we playing?
if (++counter == COUNTER_MAX)
{
counter = 0;
organ = (organ + (mozziAnalogRead(CV_POT3) * NUM_DRAWBAR_SELECTIONS)) >> 10; // Organ Selection
}
}
int updateAudio()
{
uint8_t* d = drawbars[organ];
int32_t val = oscils[0].next() * d[0]; // hoisting this out gives me just enough computational space to avoid clicks, ugh
for(uint8_t i = 1; i < 9; i++)
{
val += (oscils[i].next() * d[i]);
}
return ((val >> 8) * gain) >> 8;
}