<html aria-label="message body"><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;">BTW, while researching creating green noise I came across a website for a Mac and iOS app:<div><br></div><div><div style="display: block;"><div style="-webkit-user-select: all; -webkit-user-drag: element; display: inline-block;" class="apple-rich-link" draggable="true" role="link" data-url="https://simplynoise.com/"><a style="border-radius:10px;font-family:-apple-system, Helvetica, Arial, sans-serif;display:block;-webkit-user-select:none;width:300px;user-select:none;-webkit-user-modify:read-only;user-modify:read-only;overflow:hidden;text-decoration:none;" class="lp-rich-link" rel="nofollow" href="https://simplynoise.com/" dir="ltr" role="button" draggable="false" width="300"><table style="table-layout:fixed;border-collapse:collapse;width:300px;background-color:#0D2B96;font-family:-apple-system, Helvetica, Arial, sans-serif;" class="lp-rich-link-emailBaseTable" cellpadding="0" cellspacing="0" border="0" width="300"><tbody><tr><td vertical-align="center"><table bgcolor="#0D2B96" cellpadding="0" cellspacing="0" width="300" style="table-layout:fixed;font-family:-apple-system, Helvetica, Arial, sans-serif;background-color:rgba(13, 43, 150, 1);-apple-color-filter:initial;" class="lp-rich-link-captionBar"><tbody><tr><td style="padding:8px 0px 8px 0px;" class="lp-rich-link-captionBar-textStackItem"><div style="max-width:100%;margin:0px 16px 0px 16px;overflow:hidden;" class="lp-rich-link-captionBar-textStack"><div style="word-wrap:break-word;font-weight:500;font-size:12px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-topCaption-leading"><a rel="nofollow" href="https://simplynoise.com/" style="text-decoration: none" draggable="false"><font color="#FFFFFF" style="color: rgba(255, 255, 255, 1);">The original free color noise generator on the Internet. Hear what your mind has been missing…</font></a></div><div style="word-wrap:break-word;font-weight:400;font-size:11px;overflow:hidden;text-overflow:ellipsis;text-align:left;" class="lp-rich-link-captionBar-textStack-bottomCaption-leading"><a rel="nofollow" href="https://simplynoise.com/" style="text-decoration: none" draggable="false"><font color="#FFFFFF" style="color: rgba(255, 255, 255, 0.698039);">simplynoise.com</font></a></div></div></td><td style="padding:6px 12px 6px 0px;" class="lp-rich-link-captionBar-rightIconItem" width="30"><a rel="nofollow" href="https://simplynoise.com/" draggable="false"><img style="pointer-events:none !important;display:inline-block;width:30px;height:30px;border-radius:3px;" width="30" height="30" draggable="false" class="lp-rich-link-captionBar-rightIcon" alt="cropped-web_sn_appicon_512-1-180x180.png" src="cid:F73990D6-0EED-4304-8E94-43C310B5A1A9"></a></td></tr></tbody></table></td></tr></tbody></table></a></div></div><br id="lineBreakAtBeginningOfMessage"><div><br></div><div>In addition to noise colors, t also has beach sounds, fireplaces, babbling brooks, etc.</div><div><br></div><div>Fun little app.</div><div><br></div><div><br><blockquote type="cite"><div>On Mar 3, 2026, at 5:56 PM, Thomas Hudson via Synth-diy <synth-diy@synth-diy.org> wrote:</div><br class="Apple-interchange-newline"><div><div>Interesting idea and article. <br><br><blockquote type="cite">On Mar 3, 2026, at 4:58 PM, Mike Beauchamp <list@mikebeauchamp.com> wrote:<br><br>Hi Thomas,<br>Maybe take all of the different noises, and feed them into an interpolating scanner circuit (like this one: https://till.com/articles/scanner/ ) and from there you could control the output noise colour (and anything inbetween) with the wandering CV.<br><br>I wonder if the different noise colours all need to be derived from a single source for the crossfading to work.<br><br>Mike<br><br><br>On 2026-03-02 18:20, Thomas Hudson via Synth-diy wrote:<br><blockquote type="cite">I have an analog module that can generate blue, white, pink, and red (brownian) noise. I’m interested in how I might create a random walk using perhaps a sample/hold and smoothing function to produce a sort of wandering control voltage from each of these noise sources.<br>I also was recently introduced to green noise. From Wikipedia:<br> * The mid-frequency component of white noise, used in halftone<br> <https://en.wikipedia.org/wiki/Halftone>dithering<br> <https://en.wikipedia.org/wiki/Dithering>^[19]<br> <https://en.wikipedia.org/wiki/Blue_noise#cite_note-19><br> * Bounded Brownian noise<br> * Vocal spectrum noise used for testing audio circuits^[20]<br> <https://en.wikipedia.org/wiki/Blue_noise#cite_note-comp.dsp_FAQ-20><br> * Joseph S. Wisniewski writes that "green noise" is marketed by<br> producers of ambient sound effects recordings as "the background<br> noise of the world". It simulates the spectra of natural settings,<br> without human-made noise. It is similar to pink noise, but has more<br> energy in the area of 500 Hz.<br>Wondering how I might generate this other than using something like a bandpass filter tuned to 500 Hz using pink noise. I want to generate it in the analog realm.<br>TIA,<br>Thomas<br>________________________________________________________<br>This is the Synth-diy mailing list<br>Submit email to: Synth-diy@synth-diy.org<br>View archive at: https://synth-diy.org/pipermail/synth-diy/<br>Check your settings at: https://synth-diy.org/mailman/listinfo/synth-diy<br>Selling or trading? Use marketplace@synth-diy.org<br></blockquote>________________________________________________________<br>This is the Synth-diy mailing list<br>Submit email to: Synth-diy@synth-diy.org<br>View archive at: https://synth-diy.org/pipermail/synth-diy/<br>Check your settings at: https://synth-diy.org/mailman/listinfo/synth-diy<br>Selling or trading? Use marketplace@synth-diy.org<br></blockquote><br><br>________________________________________________________<br>This is the Synth-diy mailing list<br>Submit email to: Synth-diy@synth-diy.org<br>View archive at: https://synth-diy.org/pipermail/synth-diy/<br>Check your settings at: https://synth-diy.org/mailman/listinfo/synth-diy<br>Selling or trading? Use marketplace@synth-diy.org<br></div></div></blockquote></div><br></div></body></html>