<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">I remember the BBD well, but why so much interest in it now? Curious <br id="lineBreakAtBeginningOfSignature"><div dir="ltr">Benjamin Tremblay</div><div dir="ltr"><br><blockquote type="cite">On Oct 6, 2024, at 2:12 PM, Michael E Caloroso via Synth-diy <synth-diy@synth-diy.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr">I can't find my hard copy, but Roland had a US patent for a BBD based pitch shifter.<div><br></div><div>MC</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Oct 6, 2024 at 2:55 AM houshu--- via Synth-diy <<a href="mailto:synth-diy@synth-diy.org">synth-diy@synth-diy.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;border-left-color:rgb(204,204,204);padding-left:1ex"><u></u> <div><div dir="auto" style="unicode-bidi:embed"><div>Hello Didier,</div><p><br></p><p>A set of schematics of BBD based pitch shifter is here:</p><p><br></p><p><a href="https://www.experimentalistsanonymous.com/diy/index.php?dir=Schematics/Vibrato%20and%20Pitch%20Shift" target="_blank">https://www.experimentalistsanonymous.com/diy/index.php?dir=Schematics/Vibrato%20and%20Pitch%20Shift</a></p><p><br></p><p>Please check Wacky harmonizer (an article from a Japanese magazine).</p><p>As discussed here, cross fading seems to be a problem.<br></p><p><br></p><p>Osamu Sam Hoshuyama</p><p>Kawasaki JAPAN. <br></p><br><blockquote style="margin:0px auto;padding:0px 2em;border-left-width:2px;border-left-style:solid;border-left-color:rgb(0,173,229);white-space:pre-wrap"><br><br>------ Original Message ------<br>差出人: "Didier Leplae via Synth-diy" <<a href="mailto:synth-diy@synth-diy.org" target="_blank">synth-diy@synth-diy.org</a>><br>To: "synth-diy@synth-diy org" <<a href="mailto:synth-diy@synth-diy.org" target="_blank">synth-diy@synth-diy.org</a>><br>送信済み: 土曜日, 2024/10/5 02:44<br>件名: [sdiy] Frequency shifted from BBD?<br><br>I recently re-read the section in Barry Klein’s Electronic Music Circuits on bucket brigade devices and noticed a brief mention of using them as a frequency shifter by modulating with a ramp wave.<br>
He acknowledges that there will always be an audible glitch and some noise issues. <br>
I experimented with this idea a little to minimal success, but curious if anyone else has tried this or seen it used in interesting ways.<br>
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