{"id":3010,"date":"2021-04-29T12:06:12","date_gmt":"2021-04-29T10:06:12","guid":{"rendered":"https:\/\/www.pschatzmann.ch\/home\/?p=3010"},"modified":"2025-02-28T17:28:18","modified_gmt":"2025-02-28T16:28:18","slug":"bluetooth-a2dp-streaming-from-an-digital-i2s-microphone","status":"publish","type":"post","link":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/","title":{"rendered":"Bluetooth A2DP &#8211; Streaming from an Digital I2S Microphone"},"content":{"rendered":"<p>In my <a href=\"https:\/\/github.com\/pschatzmann\/ESP32-A2DP\">Arduino ESP32-A2DP library<\/a> I am providing some very simple examples that show how to transform the ESP32 into a A2DP source and transmit sound to a Bluetooth Sink (e.g. some Bluetooth Speakers).<\/p>\n<p>I had quite a few questions on how to do this with files, microphones and I2S as input. So I started a <a href=\"https:\/\/github.com\/pschatzmann\/arduino-audio-tools\">small &#8220;glue&#8221; project which provides some additional audio tools<\/a>. I plan to provide plenty of additional examples and some more advances scenarios.<\/p>\n<p>In my <a href=\"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/25\/esp32-sound-processing-library\/\">last blog<\/a>, I showed how to use an <strong>analog microphone<\/strong>. The quality of the sound however is much better if you use a <strong>digital microphone<\/strong> that provides the data via I2S.<\/p>\n<h1>Digital I2S Microphones<\/h1>\n<h2>The Sketch<\/h2>\n<p>Here is the Arduino Sketch that you can use with an I2S sound source:<\/p>\n<pre><code>#include \"AudioTools.h\"\n#include \"AudioTools\/AudioLibs\/A2DPStream.h\"\n\nAudioInfo info32(44100, 2, 32);\nAudioInfo info16(44100, 2, 16);\nBluetoothA2DPSource a2dp_source;\nI2SStream i2s;\nFormatConverterStream conv(i2s);\nconst int BYTES_PER_FRAME = 4;\n\n\nint32_t get_sound_data(Frame* data, int32_t frameCount) {\n  return conv.readBytes((uint8_t*)data, frameCount*BYTES_PER_FRAME)\/BYTES_PER_FRAME;\n}\n\n\/\/ Arduino Setup\nvoid setup(void) {\n  Serial.begin(115200);\n  AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);\n\n  \/\/ setup conversion\n  conv.begin(info32, info16);\n\n  \/\/ start i2s input with default configuration\n  Serial.println(\"starting I2S...\");\n  auto cfg = i2s.defaultConfig(RX_MODE);\n  cfg.i2s_format = I2S_STD_FORMAT; \/\/ or try with I2S_LSB_FORMAT\n  cfg.copyFrom(info32);\n  cfg.is_master = true;\n  i2s.begin(cfg);\n\n  \/\/ start the bluetooth\n  Serial.println(\"starting A2DP...\");\n  \/\/ a2dp_source.set_auto_reconnect(false);\n  a2dp_source.start(\"LEXON MINO L\", get_sound_data);\n\n  Serial.println(\"A2DP started\");\n}\n\n\/\/ Arduino loop - repeated processing\nvoid loop() { delay(1000); }\n<\/code><\/pre>\n<p>We implement a A2DP source: We stream the sound input which we read in from the I2S interface to a A2DP sink. We can use any device which provides the sound data via I2S. In order to test the functionality we use the INMP441 microphone.<\/p>\n<p>We use the <a href=\"https:\/\/pschatzmann.github.io\/arduino-audio-tools\/html\/classaudio__tools_1_1_i2_s.html\">I2S class<\/a> which just wraps the native ESP32 I2S calls. The INMP441 provides the data for one channel only. The <a href=\"https:\/\/pschatzmann.github.io\/arduino-audio-tools\/html\/classaudio__tools_1_1_converter_fill_left_and_right.html\">ConverterFillLeftAndRight<\/a> class makes sure that we have sound on both channels and finally A2DP requires int16_t data &#8211; so we need to convert it using the <a href=\"https:\/\/pschatzmann.github.io\/arduino-audio-tools\/html\/classaudio__tools_1_1_channel_converter.html\">ChannelConverter class<\/a>;<\/p>\n<h2>The Device<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/pschatzmann.github.io\/Resources\/img\/inmp441.jpeg\" alt=\"INMP441\" \/><\/p>\n<p>The INMP441 is a high-performance, low power, digital-output, omnidirectional MEMS microphone with a bottom port. The complete INMP441 solution consists of a MEMS sensor, signal conditioning, an analog-to-digital converter, anti-aliasing filters, power management, and an industry-standard 24-bit I\u00b2S interface. The I\u00b2S interface allows the INMP441 to connect directly to digital processors, such as DSPs and microcontrollers, without the need for an audio codec in the system.<\/p>\n<h2>Pins<\/h2>\n<table>\n<thead>\n<tr>\n<th>INMP441<\/th>\n<th>ESP32<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>VDD<\/td>\n<td>3.3<\/td>\n<\/tr>\n<tr>\n<td>GND<\/td>\n<td>GND<\/td>\n<\/tr>\n<tr>\n<td>SD<\/td>\n<td>IN (GPIO32)<\/td>\n<\/tr>\n<tr>\n<td>L\/R<\/td>\n<td>GND<\/td>\n<\/tr>\n<tr>\n<td>WS<\/td>\n<td>WS (GPIO15)<\/td>\n<\/tr>\n<tr>\n<td>SCK<\/td>\n<td>BCK (GPIO14)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><strong>SCK:<\/strong> Serial data clock for I\u00b2S interface<br \/>\n<strong>WS:<\/strong> Select serial data words for the I\u00b2S interface<br \/>\n<strong>L\/R:<\/strong> Left \/ right channel selection<br \/>\n        When set to low, the microphone emits signals on the left channel of the I\u00b2S frame.<br \/>\n        When the high level is set, the microphone will send signals on the right channel.<br \/>\n<strong>ExSD:<\/strong> Serial data output of the I\u00b2S interface<br \/>\n<strong>VCC:<\/strong> input power 1.8V to 3.3V<br \/>\n<strong>GND:<\/strong> Power ground<\/p>\n<h2>Source Code<\/h2>\n<p>Both the <a href=\"https:\/\/github.com\/pschatzmann\/arduino-audio-tools\">project<\/a> and the <a href=\"https:\/\/github.com\/pschatzmann\/arduino-audio-tools\/tree\/main\/examples\/examples-communication\/a2dp\/basic-i2s-a2dp\">example<\/a> can be found on Github.<\/p>\n<p>Final Comments: Please note that the project is under active development and that things might change. If you want to try it out please use the version from the example directory!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In my Arduino ESP32-A2DP library I am providing some very simple examples that show how to transform the ESP32 into a A2DP source and transmit sound to a Bluetooth Sink (e.g. some Bluetooth Speakers). I had quite a few questions on how to do this with files, microphones and I2S [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3011,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[20,22],"tags":[46],"class_list":["post-3010","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-arduino","category-machine-sound","tag-communications"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bluetooth A2DP - Streaming from an Digital I2S Microphone - Phil Schatzmann<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bluetooth A2DP - Streaming from an Digital I2S Microphone - Phil Schatzmann\" \/>\n<meta property=\"og:description\" content=\"In my Arduino ESP32-A2DP library I am providing some very simple examples that show how to transform the ESP32 into a A2DP source and transmit sound to a Bluetooth Sink (e.g. some Bluetooth Speakers). I had quite a few questions on how to do this with files, microphones and I2S [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/\" \/>\n<meta property=\"og:site_name\" content=\"Phil Schatzmann\" \/>\n<meta property=\"article:published_time\" content=\"2021-04-29T10:06:12+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-02-28T16:28:18+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.pschatzmann.ch\/wp-content\/uploads\/2021\/04\/inmp441.jpeg\" \/>\n\t<meta property=\"og:image:width\" content=\"231\" \/>\n\t<meta property=\"og:image:height\" content=\"218\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"pschatzmann\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"pschatzmann\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/\"},\"author\":{\"name\":\"pschatzmann\",\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/#\\\/schema\\\/person\\\/73a53638a4e34e8373405fd737dac9b1\"},\"headline\":\"Bluetooth A2DP &#8211; Streaming from an Digital I2S Microphone\",\"datePublished\":\"2021-04-29T10:06:12+00:00\",\"dateModified\":\"2025-02-28T16:28:18+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/\"},\"wordCount\":459,\"commentCount\":29,\"publisher\":{\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/#\\\/schema\\\/person\\\/73a53638a4e34e8373405fd737dac9b1\"},\"image\":{\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.pschatzmann.ch\\\/wp-content\\\/uploads\\\/2021\\\/04\\\/inmp441.jpeg\",\"keywords\":[\"Communications\"],\"articleSection\":[\"Arduino\",\"Machine Sound\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/\",\"url\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/\",\"name\":\"Bluetooth A2DP - Streaming from an Digital I2S Microphone - Phil Schatzmann\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.pschatzmann.ch\\\/wp-content\\\/uploads\\\/2021\\\/04\\\/inmp441.jpeg\",\"datePublished\":\"2021-04-29T10:06:12+00:00\",\"dateModified\":\"2025-02-28T16:28:18+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.pschatzmann.ch\\\/wp-content\\\/uploads\\\/2021\\\/04\\\/inmp441.jpeg\",\"contentUrl\":\"https:\\\/\\\/www.pschatzmann.ch\\\/wp-content\\\/uploads\\\/2021\\\/04\\\/inmp441.jpeg\",\"width\":231,\"height\":218},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/2021\\\/04\\\/29\\\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Bluetooth A2DP &#8211; Streaming from an Digital I2S Microphone\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/#website\",\"url\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/\",\"name\":\"Phil Schatzmann Consulting\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/#\\\/schema\\\/person\\\/73a53638a4e34e8373405fd737dac9b1\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/home\\\/#\\\/schema\\\/person\\\/73a53638a4e34e8373405fd737dac9b1\",\"name\":\"pschatzmann\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/pschatzmann.png\",\"url\":\"https:\\\/\\\/www.pschatzmann.ch\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/pschatzmann.png\",\"contentUrl\":\"https:\\\/\\\/www.pschatzmann.ch\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/pschatzmann.png\",\"width\":305,\"height\":305,\"caption\":\"pschatzmann\"},\"logo\":{\"@id\":\"https:\\\/\\\/www.pschatzmann.ch\\\/wp-content\\\/uploads\\\/2022\\\/08\\\/pschatzmann.png\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Bluetooth A2DP - Streaming from an Digital I2S Microphone - Phil Schatzmann","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/","og_locale":"en_US","og_type":"article","og_title":"Bluetooth A2DP - Streaming from an Digital I2S Microphone - Phil Schatzmann","og_description":"In my Arduino ESP32-A2DP library I am providing some very simple examples that show how to transform the ESP32 into a A2DP source and transmit sound to a Bluetooth Sink (e.g. some Bluetooth Speakers). I had quite a few questions on how to do this with files, microphones and I2S [&hellip;]","og_url":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/","og_site_name":"Phil Schatzmann","article_published_time":"2021-04-29T10:06:12+00:00","article_modified_time":"2025-02-28T16:28:18+00:00","og_image":[{"width":231,"height":218,"url":"https:\/\/www.pschatzmann.ch\/wp-content\/uploads\/2021\/04\/inmp441.jpeg","type":"image\/jpeg"}],"author":"pschatzmann","twitter_card":"summary_large_image","twitter_misc":{"Written by":"pschatzmann","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/#article","isPartOf":{"@id":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/"},"author":{"name":"pschatzmann","@id":"https:\/\/www.pschatzmann.ch\/home\/#\/schema\/person\/73a53638a4e34e8373405fd737dac9b1"},"headline":"Bluetooth A2DP &#8211; Streaming from an Digital I2S Microphone","datePublished":"2021-04-29T10:06:12+00:00","dateModified":"2025-02-28T16:28:18+00:00","mainEntityOfPage":{"@id":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/"},"wordCount":459,"commentCount":29,"publisher":{"@id":"https:\/\/www.pschatzmann.ch\/home\/#\/schema\/person\/73a53638a4e34e8373405fd737dac9b1"},"image":{"@id":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/#primaryimage"},"thumbnailUrl":"https:\/\/www.pschatzmann.ch\/wp-content\/uploads\/2021\/04\/inmp441.jpeg","keywords":["Communications"],"articleSection":["Arduino","Machine Sound"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/","url":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/","name":"Bluetooth A2DP - Streaming from an Digital I2S Microphone - Phil Schatzmann","isPartOf":{"@id":"https:\/\/www.pschatzmann.ch\/home\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/#primaryimage"},"image":{"@id":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/#primaryimage"},"thumbnailUrl":"https:\/\/www.pschatzmann.ch\/wp-content\/uploads\/2021\/04\/inmp441.jpeg","datePublished":"2021-04-29T10:06:12+00:00","dateModified":"2025-02-28T16:28:18+00:00","breadcrumb":{"@id":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/#primaryimage","url":"https:\/\/www.pschatzmann.ch\/wp-content\/uploads\/2021\/04\/inmp441.jpeg","contentUrl":"https:\/\/www.pschatzmann.ch\/wp-content\/uploads\/2021\/04\/inmp441.jpeg","width":231,"height":218},{"@type":"BreadcrumbList","@id":"https:\/\/www.pschatzmann.ch\/home\/2021\/04\/29\/bluetooth-a2dp-streaming-from-an-digital-i2s-microphone\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.pschatzmann.ch\/home\/"},{"@type":"ListItem","position":2,"name":"Bluetooth A2DP &#8211; Streaming from an Digital I2S Microphone"}]},{"@type":"WebSite","@id":"https:\/\/www.pschatzmann.ch\/home\/#website","url":"https:\/\/www.pschatzmann.ch\/home\/","name":"Phil Schatzmann Consulting","description":"","publisher":{"@id":"https:\/\/www.pschatzmann.ch\/home\/#\/schema\/person\/73a53638a4e34e8373405fd737dac9b1"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.pschatzmann.ch\/home\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":["Person","Organization"],"@id":"https:\/\/www.pschatzmann.ch\/home\/#\/schema\/person\/73a53638a4e34e8373405fd737dac9b1","name":"pschatzmann","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.pschatzmann.ch\/wp-content\/uploads\/2022\/08\/pschatzmann.png","url":"https:\/\/www.pschatzmann.ch\/wp-content\/uploads\/2022\/08\/pschatzmann.png","contentUrl":"https:\/\/www.pschatzmann.ch\/wp-content\/uploads\/2022\/08\/pschatzmann.png","width":305,"height":305,"caption":"pschatzmann"},"logo":{"@id":"https:\/\/www.pschatzmann.ch\/wp-content\/uploads\/2022\/08\/pschatzmann.png"}}]}},"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.pschatzmann.ch\/home\/wp-json\/wp\/v2\/posts\/3010","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pschatzmann.ch\/home\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pschatzmann.ch\/home\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pschatzmann.ch\/home\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pschatzmann.ch\/home\/wp-json\/wp\/v2\/comments?post=3010"}],"version-history":[{"count":22,"href":"https:\/\/www.pschatzmann.ch\/home\/wp-json\/wp\/v2\/posts\/3010\/revisions"}],"predecessor-version":[{"id":6607,"href":"https:\/\/www.pschatzmann.ch\/home\/wp-json\/wp\/v2\/posts\/3010\/revisions\/6607"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.pschatzmann.ch\/home\/wp-json\/wp\/v2\/media\/3011"}],"wp:attachment":[{"href":"https:\/\/www.pschatzmann.ch\/home\/wp-json\/wp\/v2\/media?parent=3010"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pschatzmann.ch\/home\/wp-json\/wp\/v2\/categories?post=3010"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pschatzmann.ch\/home\/wp-json\/wp\/v2\/tags?post=3010"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}