{"id":6109,"date":"2026-04-19T20:16:19","date_gmt":"2026-04-19T20:16:19","guid":{"rendered":"https:\/\/composers-inside-electronics.net\/cie-wp20\/?p=6109"},"modified":"2026-04-19T20:16:22","modified_gmt":"2026-04-19T20:16:22","slug":"convolution-reverb-on-a-daisy-seed","status":"publish","type":"post","link":"https:\/\/composers-inside-electronics.net\/cie-wp20\/convolution-reverb-on-a-daisy-seed\/","title":{"rendered":"Convolution Reverb on a Daisy Seed"},"content":{"rendered":"\n<figure class=\"wp-block-pullquote\"><blockquote><p>for Proxima<\/p><cite>a new work<\/cite><\/blockquote><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Here ideas riffing on convolution reverb and Daisy Seed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prompt &#8220;generate code for a daisy seed for a convolution reverb&#8221;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">See also <a href=\"https:\/\/electro-smith.com\/products\/daisy-seed\">https:\/\/electro-smith.com\/products\/daisy-seed<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Haven&#8217;t tried below but looks plausible.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Imagine microphone input devices hanging in a gallery. Upon entering a gallery, a visitor scans a QRCode on their smartphone, selects some signal generation, hold the output of the phone to the device in the gallery that is connected to specialized loudspeakers.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6afa34528e8c7\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6afa34528e8c7\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/composers-inside-electronics.net\/cie-wp20\/convolution-reverb-on-a-daisy-seed\/#Convolution_Reverb_Code_Generated_using_Google_AI\" >Convolution Reverb Code Generated using Google AI<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/composers-inside-electronics.net\/cie-wp20\/convolution-reverb-on-a-daisy-seed\/#Other_Links_not_from_AI\" >Other Links (not from AI)<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Convolution_Reverb_Code_Generated_using_Google_AI\"><\/span>Convolution Reverb <strong>Code Generated using Google AI<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Implementing a convolution reverb on the Daisy Seed requires utilizing SDRAM for the long impulse response (IR) samples and efficient DSP for processing, typically found in the library&#8217;s .<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Below is a foundational C++ code structure using and to create a mono-to-stereo convolution reverb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prerequisites<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>DaisyToolchain<\/strong> installed.<\/li>\n\n\n\n<li>An <strong>Impulse Response WAV file<\/strong> (16\/24-bit PCM mono) placed in the project folder.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Convolution Reverb Code ()<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include \"daisy_seed.h\"\n#include \"daisysp.h\"\n#include &lt;string>\n\nusing namespace daisy;\nusing namespace daisysp;\n\n\/\/ -- Configuration --\n#define IR_SIZE 48000 \/\/ 1 second at 48k\n\/\/ Allocate IR in SDRAM\nfloat DSY_SDRAM_BSS ir_buffer&#91;IR_SIZE]; \nfloat DSY_SDRAM_BSS conv_buffer&#91;IR_SIZE * 2]; \/\/ For processing\n\n\/\/ -- Objects --\nDaisySeed hw;\nFastConvolver l_conv, r_conv;\nParameter drywet_param;\nfloat drywet_val;\n\n\/\/ -- Audio Callback --\nvoid AudioCallback(AudioHandle::InputBuffer in, AudioHandle::OutputBuffer out, size_t size)\n{\n    drywet_val = drywet_param.Process();\n\n    for (size_t i = 0; i &lt; size; i++)\n    {\n        \/\/ Get input, apply drywet\n        float dry = in&#91;0]&#91;i];\n        \n        \/\/ Process Convolution\n        float wet = l_conv.Process(dry); \n\n        \/\/ Output Wet\/Dry mix\n        out&#91;0]&#91;i] = (dry * (1.0f - drywet_val)) + (wet * drywet_val);\n        out&#91;1]&#91;i] = (dry * (1.0f - drywet_val)) + (wet * drywet_val);\n    }\n}\n\nint main(void)\n{\n    \/\/ -- Initialize Hardware --\n    hw.Init();\n    hw.SetAudioSampleRate(SaiHandle::Config::SampleRate::SAI_48KHZ);\n    float samplerate = hw.AudioSampleRate();\n\n    \/\/ -- Load IR (Placeholder for actual WAV loading logic) --\n    \/\/ In a real project, use FatFs to load WAV into ir_buffer\n    for(int i=0; i&lt;IR_SIZE; i++) ir_buffer&#91;i] = 0; \n    ir_buffer&#91;0] = 1.0f; \/\/ Impulse (dummy)\n\n    \/\/ -- Initialize Convolvers --\n    l_conv.Init(ir_buffer, IR_SIZE, conv_buffer);\n    r_conv.Init(ir_buffer, IR_SIZE, conv_buffer + IR_SIZE);\n\n    \/\/ -- Initialize Parameters --\n    drywet_param.Init(hw.adc.GetPtr(0), 0.0f, 1.0f, Parameter::LINEAR);\n\n    \/\/ -- Start Audio --\n    hw.StartAudio(AudioCallback);\n\n    while(1) {}\n}\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Key Implementation Details<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>SDRAM Usage:<\/strong> Convolution requires long buffers. The .<\/li>\n\n\n\n<li><strong>:<\/strong> provides a .<\/li>\n\n\n\n<li><strong>Impulse Response Loading:<\/strong> The example uses a dummy impulse ( at index 0). To make this functional, you must use the library to read a WAV file from an SD card into the during .<\/li>\n\n\n\n<li><strong>Wet\/Dry Mix:<\/strong> The output is a mix between the original signal () and the convolved signal (.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">To Compile and Flash<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Create a new project folder in .<\/li>\n\n\n\n<li>Add the (copied from another example).<\/li>\n\n\n\n<li>Add the code above.<\/li>\n\n\n\n<li>Run and .<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\"><em>AI responses may include mistakes.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Other_Links_not_from_AI\"><\/span>Other Links (not from AI)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/composers-inside-electronics.net\/cie-wp20\/ai-generated-node-js-convolution-player\/\">AI generated node.js convolution player<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/composers-inside-electronics.net\/cie-wp20\/ai-on-generate-a-web-page-to-select-an-audio-clip-to-play-through-a-selected-impulse-convolution\/\">AI Generated HTML for Convolution Player<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>for Proxima a new work Here ideas riffing on convolution reverb and Daisy Seed. Prompt &#8220;generate code for a daisy seed for a convolution reverb&#8221; [&#8230;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"h5ap_radio_sources":[],"footnotes":""},"categories":[301,5],"tags":[403,410,411,412],"class_list":["post-6109","post","type-post","status-publish","format-standard","hentry","category-cie-evolution-2024","category-technical","tag-ai","tag-convolution","tag-daisy-seed","tag-proxima"],"post_type":"post","author_name":"Philip Edelstein","_links":{"self":[{"href":"https:\/\/composers-inside-electronics.net\/cie-wp20\/wp-json\/wp\/v2\/posts\/6109","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/composers-inside-electronics.net\/cie-wp20\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/composers-inside-electronics.net\/cie-wp20\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/composers-inside-electronics.net\/cie-wp20\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/composers-inside-electronics.net\/cie-wp20\/wp-json\/wp\/v2\/comments?post=6109"}],"version-history":[{"count":1,"href":"https:\/\/composers-inside-electronics.net\/cie-wp20\/wp-json\/wp\/v2\/posts\/6109\/revisions"}],"predecessor-version":[{"id":6110,"href":"https:\/\/composers-inside-electronics.net\/cie-wp20\/wp-json\/wp\/v2\/posts\/6109\/revisions\/6110"}],"wp:attachment":[{"href":"https:\/\/composers-inside-electronics.net\/cie-wp20\/wp-json\/wp\/v2\/media?parent=6109"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/composers-inside-electronics.net\/cie-wp20\/wp-json\/wp\/v2\/categories?post=6109"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/composers-inside-electronics.net\/cie-wp20\/wp-json\/wp\/v2\/tags?post=6109"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}