<div dir="ltr">On Mon, 20 Aug 2018 at 00:40, Mike Beauchamp <<a href="mailto:list@mikebeauchamp.com">list@mikebeauchamp.com</a>> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br><br>
The other frequency-dependent waveform change I see in some gear is when <br>
square waves can't maintain their peaks at very low frequency look more <br>
like saw-tooth waves - which I always thought was due to strain on the <br>
power supply?<br>
<br>
Interesting topic, mathematically perfect waveforms do feel straining.<br>
<br>
Mike<br><br></blockquote><div><br></div><div>If you have a regular comparator type square wave generator then you will get flat square segments, but when you dc block the square wave to make it AC coupled the flat lines turn into exponential curves back to zero (high pass), which is probably what you're referring to. If you clip off one side of this double sawish shape then you get a saw type shape with a long flat section, a narrow and thinner sounding saw. This waveform is often used in string synths as their "saw", since you can easily generate these shapes from divide down square wave oscillators.</div><div><br></div><div>Andy</div></div></div>