{"id":18697076,"url":"https://github.com/marcel-licence/esp32_basic_synth","last_synced_at":"2025-10-09T11:06:23.476Z","repository":{"id":37913431,"uuid":"343904030","full_name":"marcel-licence/esp32_basic_synth","owner":"marcel-licence","description":"ESP32 based simple synthesizer project","archived":false,"fork":false,"pushed_at":"2024-10-16T22:34:06.000Z","size":1146,"stargazers_count":268,"open_issues_count":4,"forks_count":41,"subscribers_count":15,"default_branch":"main","last_synced_at":"2025-04-04T01:07:01.727Z","etag":null,"topics":["arduino","audio","esp32","midi","synthesizer"],"latest_commit_sha":null,"homepage":"","language":"C++","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"gpl-3.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/marcel-licence.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null,"governance":null,"roadmap":null,"authors":null,"dei":null,"publiccode":null,"codemeta":null}},"created_at":"2021-03-02T20:29:56.000Z","updated_at":"2025-03-18T19:38:59.000Z","dependencies_parsed_at":"2024-06-24T15:29:50.195Z","dependency_job_id":"79e01c72-e613-4e60-90f4-706b38b71a2a","html_url":"https://github.com/marcel-licence/esp32_basic_synth","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marcel-licence%2Fesp32_basic_synth","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marcel-licence%2Fesp32_basic_synth/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marcel-licence%2Fesp32_basic_synth/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/marcel-licence%2Fesp32_basic_synth/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/marcel-licence","download_url":"https://codeload.github.com/marcel-licence/esp32_basic_synth/tar.gz/refs/heads/main","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":248633569,"owners_count":21136891,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["arduino","audio","esp32","midi","synthesizer"],"created_at":"2024-11-07T11:22:46.348Z","updated_at":"2025-10-09T11:06:23.412Z","avatar_url":"https://github.com/marcel-licence.png","language":"C++","funding_links":[],"categories":[],"sub_categories":[],"readme":"\u003ch1 align=\"center\"\u003eesp32_basic_synth\u003c/h1\u003e\n\u003ch3 align=\"center\"\u003eESP32 based DIY polyphonic MIDI synthesizer module Arduino project\u003c/h3\u003e  \n\u003cp align=\"center\"\u003e \n  \u003cimg src=\"img/splash.jpg\" alt=\"project picture\" width=\"480px\" height=\"270px\"\u003e\u003cbr\u003e\n  \u003ca href=\"https://youtu.be/5XVK5MOKmZw\"\u003elink to the video\u003c/a\u003e\n\u003c/p\u003e\nMore infos:\n- little quick start guide to get started with arduino synthesizer / music projects: https://youtu.be/ZNxGCB-d68g\n\n\n\u003e **⚠️ Note:** This project might be outdated and is no longer actively maintained. Development has continued in a new repository, which covers the **ESP32** and other boards as well. Please check out the latest version of the project here: **[ml_synth_basic_example](https://github.com/marcel-licence/ml_synth_basic_example)**\n\n---\nThe project has been tested on\n- ESP32 Audio Kit V2.2 (using ESP32-A1S)\n- ESP32 DEVKIT - DOIT (actually only supporting esp32\\1.0.4 library)\n\n# ESP32 Audio Kit V2.2\nTo compile set board to: ESP32 Dev Module\nEnsure \"#define ESP32_AUDIO_KIT\" is set in config.h\nIO22 will be used for MIDI in.\n\nThe ADC multiplexer can be used (other wise please remove #define ADC_TO_MIDI_ENABLED from config.h)\nConnection of the ADC multiplexer:\n- EN -\u003e Ground\n- S0 -\u003e IO23\n- S1 -\u003e IO18\n- S2 -\u003e IO14\n- S3 -\u003e Ground\n- Sig -\u003e IO12\n\n# ESP32 DEVKIT - DOIT\nTo compile set the board to: DOIT ESP32 DEVKIT V1\nEnsure that \"#define ESP32_AUDIO_KIT\" has been removed from config.h\n\n## Using a DAC\nAn external audio DAC is recommended for this setup:\n- BCLK -\u003e IO25\n- WLCK -\u003e IO27\n- DOUT -\u003e IO26\n\n## Using no DAC\nYou can also get a sound without a DAC.\nAdd '#define I2S_NODAC' to config.h\n\nThe default output pin is IO22. Add a capacitor in series of the audio line (10µF for example)\n\n## Using an ADC multiplexer\nConnection of the ADC multiplexer:\n- EN -\u003e Ground\n- S0 -\u003e IO33\n- S1 -\u003e IO32\n- S2 -\u003e IO13\n- S3 -\u003e Ground\n- Sig -\u003e IO12\nHere is the related video: https://youtu.be/l8GrNxElRkc\n\n### ADC Mapping\nThe adc module has been only tested with the ESP32 Audio Kit V2.2.\nIn z_config.ino you can define your own mapping. Actually only 8 channels are read from the multiplexer.\nThe adc lookup is used to define a channel and cc per analog input (C0..C7).\nBy changing adc values a MIDI messages will generated internally.\nIt should be also mapped int the MIDI mapping.\n\n# MIDI Mapping\nA controller mapping can be found in z_config.ino.\nYou can define your own controller mapping if your controller does support CC messages.\n\n## MIDI via USB\nMIDI can be received via USB activating the MACRO \"MIDI_VIA_USB_ENABLED\" in config.h.\n\nDefault PIN Mapping is:\n- CS: IO5\n- INT: IO17 (not used)\n- SCK: IO18\n- MISO: IO19\n- MOSI: IO23\n\nFor more information refer to the MIDI related project: https://github.com/marcel-licence/esp32_usb_midi\nUsing USB can be seen here: https://youtu.be/Mt3rT-SVZww\n\n---\nIf you have questions or ideas please feel free to use the discussion area!\n\nDerived projects \n---\n\nMichaelPNolan added a phyicial interface, knobs etc. to make it standalone: https://github.com/MichaelPNolan/StandAloneSynth37key/tree/main/esp32_alone_synth\n\n\n# Support \u0026 Donations\n\nIf you appreciate the work done on this project and would like to support its development, I would be more than happy to accept donations!\n\nFor more information on how to donate, please send an email to:\n\n📧 **marcel.licence.o@gmail.com**\n\nThank you for your support!\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmarcel-licence%2Fesp32_basic_synth","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fmarcel-licence%2Fesp32_basic_synth","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fmarcel-licence%2Fesp32_basic_synth/lists"}