├── README.md ├── .gitignore ├── camel-sample.ino └── LICENSE /README.md: -------------------------------------------------------------------------------- 1 | # Camel 2 | A script for the Arduino IDE and the Mozzi library to drive a keyless synthesizer. 3 | 4 | Requires the [Mozzi library](https://github.com/sensorium/Mozzi). 5 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | 2 | # Created by https://www.gitignore.io/api/osx 3 | # Edit at https://www.gitignore.io/?templates=osx 4 | 5 | ### OSX ### 6 | # General 7 | .DS_Store 8 | .AppleDouble 9 | .LSOverride 10 | 11 | # Icon must end with two \r 12 | Icon 13 | 14 | # Thumbnails 15 | ._* 16 | 17 | # Files that might appear in the root of a volume 18 | .DocumentRevisions-V100 19 | .fseventsd 20 | .Spotlight-V100 21 | .TemporaryItems 22 | .Trashes 23 | .VolumeIcon.icns 24 | .com.apple.timemachine.donotpresent 25 | 26 | # Directories potentially created on remote AFP share 27 | .AppleDB 28 | .AppleDesktop 29 | Network Trash Folder 30 | Temporary Items 31 | .apdisk 32 | 33 | # End of https://www.gitignore.io/api/osx 34 | 35 | .gitattributes -------------------------------------------------------------------------------- /camel-sample.ino: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | #include 8 | #include 9 | #include 10 | #include 11 | #include 12 | #include 13 | #include 14 | #include 15 | 16 | #define CONTROL_RATE 64 // powers of 2 please 17 | 18 | Metronome kMetro(25); 19 | Oscil aSin(SIN2048_DATA); 20 | Oscil aLFO(SIN2048_DATA); 21 | Oscil aSaw(SAW2048_DATA); 22 | Oscil cosModulator(COS2048_DATA); 23 | Oscil sqrModulator(SQUARE_NO_ALIAS_2048_DATA); 24 | Sample aSample(BAMBOO_00_2048_DATA); 25 | Ead envelope(CONTROL_RATE); 26 | LowPassFilter lpf; 27 | Phasor kPhase; 28 | RollingAverage kPitch; 29 | 30 | const byte kSize = 5; 31 | const byte modulation_ratio=3; // harmonics 32 | const IntMap pitchMap(0,1024,40,5000); 33 | const IntMap modMap(0,1024,10,700); 34 | const IntMap byteMap(0,1024,0,255); 35 | const IntMap bpm(0,1024,50,600); 36 | byte pot[7] = { A0, A1, A2, A3, A4, A5 }; 37 | byte sw[4] = { 5, 6, 7 }; 38 | int knobVal, rate, cutoff, gain, pitch, chunk, upperA, upperB, upperC, lowerA, lowerB, lowerC, rollingC; 39 | byte swA, swB, swC; 40 | bool kMetrun, modulate, cut, phase; 41 | long fm_intensity, modulation; 42 | float pFreq = 200.f; 43 | char wave, magnitude; 44 | 45 | void setup() { 46 | startMozzi(CONTROL_RATE); 47 | for (byte i=0;i<=2;i++) { 48 | pinMode(sw[i], INPUT_PULLUP); 49 | } 50 | Serial.begin(9600); 51 | aSin.setFreq(440); 52 | aSaw.setFreq(440); 53 | kMetro.setBPM(50); 54 | kPhase.setFreq(pFreq); 55 | aLFO.setFreq(50); 56 | aSample.setFreq(10.24f); 57 | lpf.setResonance(50); 58 | } 59 | 60 | void updateControl(){ 61 | swA = digitalRead(sw[0]); 62 | swB = digitalRead(sw[1]); 63 | swC = digitalRead(sw[2]); 64 | 65 | upperA = mozziAnalogRead(pot[0]); 66 | upperB = mozziAnalogRead(pot[1]); 67 | upperC = mozziAnalogRead(pot[2]); 68 | lowerA = mozziAnalogRead(pot[3]); 69 | lowerB = mozziAnalogRead(pot[4]); 70 | lowerC = mozziAnalogRead(pot[5]); 71 | 72 | rollingC = kPitch.next(lowerC); 73 | if (upperA > 5) { 74 | aLFO.setFreq(upperA*2); 75 | magnitude = aLFO.next(); 76 | pitch = pitchMap(rollingC); 77 | pitch = ((((float)magnitude/127)*(pitch/2))+pitch); 78 | } else { 79 | pitch = pitchMap(rollingC); 80 | } 81 | 82 | if (swC) { 83 | if (swA) { 84 | aSin.setFreq(pitch); 85 | } else { 86 | aSaw.setFreq(pitch); 87 | } 88 | } else { 89 | aSample.setFreq((float)rollingC*.01f); 90 | } 91 | 92 | if (upperC <= 1020) { 93 | cutoff = byteMap(upperC); 94 | lpf.setCutoffFreq(cutoff); 95 | cut = true; 96 | } else { 97 | cut = false; 98 | } 99 | 100 | int modulation_freq = pitch * modulation_ratio; 101 | cosModulator.setFreq(modulation_freq); 102 | sqrModulator.setFreq(modulation_freq); 103 | fm_intensity = modMap(lowerA); 104 | 105 | if (lowerA <= 5) { 106 | modulate = false; 107 | } else { 108 | modulate = true; 109 | } 110 | 111 | if (upperB >= 5) { 112 | float pAmount = upperB * .0001f; 113 | float pFreq = pitch * (1 + pAmount); 114 | kPhase.setFreq(pFreq); 115 | phase = true; 116 | } else { 117 | phase = false; 118 | } 119 | 120 | rate = bpm(lowerB); 121 | kMetro.setBPM(rate); 122 | 123 | if (swC) { 124 | if (lowerB <= 1020) { 125 | if (!kMetrun) { 126 | kMetro.start(); 127 | kMetrun = true; 128 | } 129 | if (kMetro.ready()) { 130 | envelope.start(30,700); 131 | aSample.start(); 132 | } 133 | gain = (int) envelope.next(); 134 | } else { 135 | if (kMetrun) { 136 | kMetro.stop(); 137 | kMetrun = false; 138 | } 139 | } 140 | } else { 141 | if (!kMetrun) { 142 | kMetro.start(); 143 | kMetrun = true; 144 | } 145 | if (kMetro.ready()) { 146 | aSample.start(); 147 | } 148 | } 149 | 150 | 151 | 152 | /* 153 | Serial.print("Switch 1: ");Serial.print(swA); 154 | Serial.print(" Switch 2: ");Serial.print(swB); 155 | Serial.print(" Switch 3: ");Serial.print(swC); 156 | Serial.print(" Upper 1: ");Serial.print(upperA); 157 | Serial.print(" Upper 2: ");Serial.print(upperB); 158 | Serial.print(" Upper 3: ");Serial.print(upperC); 159 | Serial.print(" Lower 1: ");Serial.print(lowerA); 160 | Serial.print(" Lower 2: ");Serial.print(lowerB); 161 | Serial.print(" Lower 3: ");Serial.print(lowerC); 162 | Serial.print(" mag: ");Serial.print(pitch); 163 | Serial.print("\n"); 164 | */ 165 | 166 | } 167 | 168 | int updateAudio(){ 169 | 170 | if (swB) { 171 | modulation = fm_intensity * cosModulator.next(); 172 | } else { 173 | modulation = fm_intensity * sqrModulator.next(); 174 | } 175 | if (swC) { 176 | if (swA) { 177 | if (modulate==true) { 178 | chunk = aSin.phMod(modulation); 179 | } else { 180 | chunk = aSin.next(); 181 | } 182 | } else { 183 | if (modulate==true) { 184 | chunk = aSaw.phMod(modulation); 185 | } else { 186 | chunk = aSaw.next(); 187 | } 188 | } 189 | if (phase==true) { 190 | char asig = kPhase.next()>>24; 191 | chunk = ((int)asig-chunk)/2; 192 | } 193 | if (kMetrun==true) { 194 | if (cut==true) { 195 | wave = (char)lpf.next((gain * chunk)>>8); 196 | } else { 197 | wave = (gain * chunk)>>8; 198 | } 199 | } else { 200 | if (cut==true) { 201 | wave = (char)lpf.next(chunk); 202 | } else { 203 | wave = chunk; 204 | } 205 | } 206 | } else { 207 | if (modulate==true) { 208 | chunk = aSample.next(); 209 | chunk = chunk + (modulation/2); 210 | } else { 211 | chunk = aSample.next(); 212 | } 213 | if (phase==true) { 214 | char asig = kPhase.next()>>24; 215 | chunk = ((int)asig-chunk)/2; 216 | } 217 | if (cut==true) { 218 | wave = (char)lpf.next(chunk); 219 | } else { 220 | wave = chunk; 221 | } 222 | } 223 | 224 | //return (wave*magnitude)>>7; 225 | 226 | return wave; 227 | } 228 | 229 | void loop() { 230 | audioHook(); 231 | } 232 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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For 483 | purposes of this definition, "control" includes the right to grant 484 | patent sublicenses in a manner consistent with the requirements of 485 | this License. 486 | 487 | Each contributor grants you a non-exclusive, worldwide, royalty-free 488 | patent license under the contributor's essential patent claims, to 489 | make, use, sell, offer for sale, import and otherwise run, modify and 490 | propagate the contents of its contributor version. 491 | 492 | In the following three paragraphs, a "patent license" is any express 493 | agreement or commitment, however denominated, not to enforce a patent 494 | (such as an express permission to practice a patent or covenant not to 495 | sue for patent infringement). To "grant" such a patent license to a 496 | party means to make such an agreement or commitment not to enforce a 497 | patent against the party. 498 | 499 | If you convey a covered work, knowingly relying on a patent license, 500 | and the Corresponding Source of the work is not available for anyone 501 | to copy, free of charge and under the terms of this License, through a 502 | publicly available network server or other readily accessible means, 503 | then you must either (1) cause the Corresponding Source to be so 504 | available, or (2) arrange to deprive yourself of the benefit of the 505 | patent license for this particular work, or (3) arrange, in a manner 506 | consistent with the requirements of this License, to extend the patent 507 | license to downstream recipients. "Knowingly relying" means you have 508 | actual knowledge that, but for the patent license, your conveying the 509 | covered work in a country, or your recipient's use of the covered work 510 | in a country, would infringe one or more identifiable patents in that 511 | country that you have reason to believe are valid. 512 | 513 | If, pursuant to or in connection with a single transaction or 514 | arrangement, you convey, or propagate by procuring conveyance of, a 515 | covered work, and grant a patent license to some of the parties 516 | receiving the covered work authorizing them to use, propagate, modify 517 | or convey a specific copy of the covered work, then the patent license 518 | you grant is automatically extended to all recipients of the covered 519 | work and works based on it. 520 | 521 | A patent license is "discriminatory" if it does not include within 522 | the scope of its coverage, prohibits the exercise of, or is 523 | conditioned on the non-exercise of one or more of the rights that are 524 | specifically granted under this License. You may not convey a covered 525 | work if you are a party to an arrangement with a third party that is 526 | in the business of distributing software, under which you make payment 527 | to the third party based on the extent of your activity of conveying 528 | the work, and under which the third party grants, to any of the 529 | parties who would receive the covered work from you, a discriminatory 530 | patent license (a) in connection with copies of the covered work 531 | conveyed by you (or copies made from those copies), or (b) primarily 532 | for and in connection with specific products or compilations that 533 | contain the covered work, unless you entered into that arrangement, 534 | or that patent license was granted, prior to 28 March 2007. 535 | 536 | Nothing in this License shall be construed as excluding or limiting 537 | any implied license or other defenses to infringement that may 538 | otherwise be available to you under applicable patent law. 539 | 540 | 12. No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------