<html><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;" class=""><br class=""><div><br class=""><blockquote type="cite" class=""><div class="">Am 27.11.2022 um 00:30 schrieb Ian Fritz via Synth-diy <<a href="mailto:synth-diy@synth-diy.org" class="">synth-diy@synth-diy.org</a>>:</div><br class="Apple-interchange-newline"><div class=""><meta charset="UTF-8" class=""><span style="caret-color: rgb(0, 0, 0); font-family: Helvetica; font-size: 14px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; float: none; display: inline !important;" class="">Does the DX7 waveform change with keyboard pitch or not? I’ve asked this question before but never got an answer.</span></div></blockquote></div><br class=""><div class="">So here we go. I measured the output of my DX7, for all six C keys of its keyboard. It was set to Init Voice, with the following modifications:</div><div class=""><div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">Algorithm 1</div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">Op1 Output Level 99</div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">Op2 Output Level 99</div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">Op3…Op6 Output Level 0</div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">Keyboard Scaling all 0</div></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">We see that the waveforms of all keys except the highest key look similar, but not exactly the same. The highest key waveform looks very different. Maybe this is just a lowpass filter effect of the DX7 (certainly not of the scope, this is a 60 MHz scope). The frequency of the highest key is about 2 kHz.</div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">If anyone wants me to measure something else, let me know!</div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class=""><br class=""></div><div style="margin: 0px; font-stretch: normal; line-height: normal;" class="">Ingo</div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="6316D941-8702-463B-A0BD-FF0CC009C17D" src="cid:9A2150D4-C853-4D73-A840-4DC659234634" class=""></div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="534CAD33-894B-41E2-9B5C-C8F85D0C7A7A" src="cid:1B8A4E5F-4D68-4B26-8BA1-0B3B7A0263B0" class=""></div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="F91C75C3-9942-431F-A0F5-E65172A69BCF" src="cid:3A4E9B63-6476-4A39-939C-785726693924" class=""></div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="971251FF-9FCE-4BF4-8B05-48AC34D061CD" src="cid:171D07CC-DFF1-4B9D-BBA6-16C4DACF2DD7" class=""></div><div class=""><br class=""></div><div class=""><img apple-inline="yes" id="9AA45E89-95EA-4088-8A78-64A6403535F0" src="cid:6AD7E5C8-866C-45B0-8872-D1337531A8E8" class=""></div></body></html>