<html><head><meta http-equiv="content-type" content="text/html; charset=us-ascii"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><br id="lineBreakAtBeginningOfMessage"><div><br><blockquote type="cite"><div>On 28 Dec 2024, at 00:06, Roman via Synth-diy <synth-diy@synth-diy.org> wrote:</div><br class="Apple-interchange-newline"><div><div style="margin-top: 0px; margin-bottom: 0px;">Following that route - why not make TOG replacement which produses exact frequencies of tonewheels, or better yet, switchable frequencies of every historical or another weird scales?</div><div style="margin-top: 0px; margin-bottom: 0px;"><br></div><div style="margin-top: 0px; margin-bottom: 0px;">Roman </div>
<br></div></blockquote></div><br><div><br></div><div>Exactly!</div><div>Don's assessment of the frequency error is pretty much admitted even in the promo blurb for one of these chips... </div><div><br></div><div><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">Our modern TOG-1 uses a microprocessor and a built-in 16 MHz crystal clock that is enabled by connecting pins XTL and CLK. For more flexibility, it is also possible to apply an external high frequency clock to the CLK pin. TOG-1 notes are very close approximations to the pitches of the musical scale. Lower frequencies may be generated by dividing each output by consecutive powers of 2 using counter ICs, thus providing octave relationships.</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">Note Frequency (Hz)*</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">C9 8368.2</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">B8 7905.1</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">A#8 7462.7</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">A8 7042.3</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">G#8 6644.5</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">G8 6269.6</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">F#8 5917.2</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">F8 5586.6</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">E8 5277.0</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">D#8 4975.1</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">D8 4694.8</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">C#8 4434.6</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">C8 4184.1</span><br style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;">*(with 16 MHz clock)</span></div><div><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><br></span></div><div><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><br></span></div><div><br></div><div><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica;"><br></span></span></div><div><span style="color: rgb(51, 51, 51); font-family: "Lucida Grande", "Trebuchet MS", Verdana, Helvetica, Arial, sans-serif; font-variant-ligatures: normal; orphans: 2; widows: 2; background-color: rgb(225, 235, 242); text-decoration-thickness: initial; text-decoration-style: initial; text-decoration-color: initial;"><span style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica;"><br></span></span></div></body></html>