<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=us-ascii">
<style type="text/css" style="display:none;"> P {margin-top:0;margin-bottom:0;} </style>
</head>
<body dir="ltr">
<div style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 12pt; color: rgb(0, 0, 0); background-color: rgb(255, 255, 255);" class="elementToProof">
Until the TRW multipliers came along it was always a case of bending the filter coefficients to minimize the number of shift/add/subtracts you needed. With that and some creative decimation you could manage quite a lot with a 9 MHz clock speed.<br>
</div>
<div id="appendonsend"></div>
<hr style="display:inline-block;width:98%" tabindex="-1">
<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Donald Tillman <don@till.com><br>
<b>Sent:</b> 22 November 2022 19:50<br>
<b>To:</b> Guy McCusker <guy.mccusker@gmail.com><br>
<b>Cc:</b> Mike Bryant <mbryant@futurehorizons.com>; mark verbos <mark@verboselectronics.com>; synth-diy@synth-diy.org <synth-diy@synth-diy.org><br>
<b>Subject:</b> Re: [sdiy] Buchla 295 10-band comb filter topology</font>
<div> </div>
</div>
<div class="BodyFragment"><font size="2"><span style="font-size:11pt;">
<div class="PlainText">> On Nov 22, 2022, at 3:46 AM, Guy McCusker via Synth-diy <synth-diy@synth-diy.org> wrote:<br>
> <br>
> Would a workable digital implementation have been possible in 1978? I<br>
> always assume the answer is no but one can be surprised.<br>
<br>
The answer is always: "How fast would you need to do a 16x16 multiply and accumulate operation?"<br>
<br>
-- Don<br>
--<br>
Donald Tillman, Palo Alto, California<br>
<a href="https://www.till.com`">https://www.till.com`</a></div>
</span></font></div>
</body>
</html>