<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body style="overflow-wrap: break-word; -webkit-nbsp-mode: space; line-break: after-white-space;"><div>On Dec 9, 2024, at 12:18 PM, Mattias Rickardsson <mr@analogue.org> wrote:</div><div><blockquote type="cite"><br class="Apple-interchange-newline"><div><div dir="auto">How linear is the human hearing, compared to the speakers or headphones needed to do these listening tests?</div></div></blockquote><div><br></div><div>Good question! Not very linear.</div><div><br></div><div>"How nonlinear?"</div><div><br></div><div>Nonlinear enough that you can make music with the intermodulation distortion products.</div><div><br></div><div>"WTF?"</div><div><br></div><div>I heard an impressive demo at Stanford's CCRMA a while ago where Alex Chechile created a piece of music with notes were never actually played, but where created in the intermodulation distortion products inside the ear.</div><div><br></div><div>Alex Chechile, "Practical applications of difference tones in electronic music composition and synthesis"</div><div><a href="https://searchworks.stanford.edu/view/13680791">https://searchworks.stanford.edu/view/13680791</a><br></div><div><br></div><div> -- Don<br>--<br>Donald Tillman, Palo Alto, California<br>https://till.com</div><div><br></div></div></body></html>