{"id":111,"date":"2024-01-15T09:00:00","date_gmt":"2024-01-15T09:00:00","guid":{"rendered":"https:\/\/www.tb-software.ch\/ai\/esp32-audio-projekt\/"},"modified":"2024-01-15T09:00:00","modified_gmt":"2024-01-15T09:00:00","slug":"esp32-audio-projekt","status":"publish","type":"post","link":"https:\/\/www.tb-software.ch\/ai\/en\/esp32-audio-projekt\/","title":{"rendered":"ESP32 Audio Project: Signal Generator & Audio Processing"},"content":{"rendered":"<h1>ESP32 Audio Project: Signal Generator &amp; Audio Processing<\/h1>\n<p>In this project, we\u2019ve developed an advanced audio system based on the ESP32 microcontroller. The system combines signal generation with audio processing functions for professional applications.<\/p>\n<h2>Project Overview<\/h2>\n<p>The ESP32 audio project includes:<\/p>\n<ul>\n<li><strong>Signal Generator<\/strong>Generation of various waveforms (sine, square, triangle)<\/li>\n<li><strong>Audio Processing<\/strong>Real-time audio processing and filtering<\/li>\n<li><strong>Wi-Fi connectivity<\/strong>Remote control via web interface<\/li>\n<li><strong>LCD display<\/strong>Local display of parameters and status<\/li>\n<\/ul>\n<h2>Technical specifications<\/h2>\n<h3>Hardware<\/h3>\n<ul>\n<li>ESP32 DevKit V1<\/li>\n<li>I2S Audio Codec (MAX98357A)<\/li>\n<li>.8\" TFT LCD display<\/li>\n<li>Rotary encoder for control<\/li>\n<li>External amplifier circuit<\/li>\n<\/ul>\n<h3>Software<\/h3>\n<ul>\n<li>Arduino IDE \/ PlatformIO<\/li>\n<li>ESP-IDF framework<\/li>\n<li>FreeRTOS for multitasking<\/li>\n<li>Web server for remote control<\/li>\n<\/ul>\n<h2>Implementation<\/h2>\n<h3>Signal generation<\/h3>\n<pre><code class=\"language-cpp\">void generateSineWave(float frequency, float amplitude) {\n    for (int i = 0; i &lt; BUFFER_SIZE; i++) {\n        float sample = amplitude * sin(2 * PI * frequency * i \/ SAMPLE_RATE);\n        audioBuffer[i] = (int16_t)(sample * 32767);\n    }\n}<\/code><\/pre>\n<h3>Audio processing pipeline<\/h3>\n<ol>\n<li><strong>Input Capture<\/strong>Microphone input via I2S<\/li>\n<li><strong>Digital Filtering<\/strong>High-pass\/Low-pass filter<\/li>\n<li><strong>Effects Processing<\/strong>Reverb, echo, compression<\/li>\n<li><strong>Output<\/strong>I2S audio output<\/li>\n<\/ol>\n<h2>Application areas<\/h2>\n<ul>\n<li><strong>Measurement technology<\/strong>Calibration of audio equipment<\/li>\n<li><strong>Music production<\/strong>Tragbare Audioeffekte<\/li>\n<li><strong>Bildung<\/strong>Demonstration von Audiosignalen<\/li>\n<li><strong>Prototyping<\/strong>Schnelle Entwicklung von Audiokonzepten<\/li>\n<\/ul>\n<h2>Ergebnisse<\/h2>\n<p>Das fertige System bietet:<\/p>\n<ul>\n<li>Frequenzbereich: 20 Hz \u2013 20 kHz<\/li>\n<li>Abtastrate: 44,1 kHz<\/li>\n<li>Bit-Tiefe: 16-Bit<\/li>\n<li>Latenz: &lt;10 ms<\/li>\n<li>WiFi-Steuerung mit responsivem Webinterface<\/li>\n<\/ul>\n<h2>Conclusion<\/h2>\n<p>Dieses Projekt demonstriert die Vielseitigkeit des ESP32 f\u00fcr Audioanwendungen. Die Kombination aus leistungsstarker Hardware und flexibler Software erm\u00f6glicht professionelle Audio-L\u00f6sungen zu einem Bruchteil der Kosten kommerzieller Systeme.<\/p>\n<p><strong>Interessiert an einem \u00e4hnlichen Projekt?<\/strong> Kontaktieren Sie uns f\u00fcr eine pers\u00f6nliche Beratung!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Development of an ESP32-based audio system with signal generator and audio processing functions for professional applications.<\/p>\n","protected":false},"author":1,"featured_media":110,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[14,11,6,10,13,12],"class_list":["post-111","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-iot-embedded","tag-arduino","tag-audio","tag-embedded","tag-esp32","tag-iot","tag-signal-processing"],"_links":{"self":[{"href":"https:\/\/www.tb-software.ch\/ai\/index.php?rest_route=\/wp\/v2\/posts\/111","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tb-software.ch\/ai\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tb-software.ch\/ai\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tb-software.ch\/ai\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tb-software.ch\/ai\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=111"}],"version-history":[{"count":0,"href":"https:\/\/www.tb-software.ch\/ai\/index.php?rest_route=\/wp\/v2\/posts\/111\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tb-software.ch\/ai\/index.php?rest_route=\/wp\/v2\/media\/110"}],"wp:attachment":[{"href":"https:\/\/www.tb-software.ch\/ai\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tb-software.ch\/ai\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tb-software.ch\/ai\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}