<p dir="ltr">It'll have more to do with how large the increment is, and what an increment means psychoacoustically. If you ramp over the range of a piano in pitch over a second, incrementing every 64 samples, each increment will be about 12.5¢, which is likely to be audible. Or if you ramped from 20hz to 20khz in frequency, you'd be adding some 28hz per increment, which is a lot of pitch at the low end.</p>
<div class="gmail_quot<blockquote class=" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"><div>Doesn't the audibility of zipper noise depend on the duration of the ramp?</div><div><br></div><div dir="ltr">I seem to remember some Supercollider tutorials that used Line.kr with</div><div dir="ltr">a duration of a second or so, and I don't remember hearing zipper noise. (Also</div><div dir="ltr">made a little Pd demo using [bang~] and a counter, but I don't know what I</div><div dir="ltr">did with it.)<br></div><div dir="ltr"><br></div><div dir="ltr">-Jonathan<br></div><div><span></span></div> <br><div><br><br></div><div style="display:block"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div dir="ltr"> <font face="Arial" size="2"> On Friday, October 2, 2015 7:41 PM, Matt Barber <<a href="mailto:brbrofsvl@gmail.com" target="_blank">brbrofsvl@gmail.com</a>> wrote:<br> </font> </div> <br><br> <div><div><div><div dir="ltr">You'll get zipper noise with the samphold per block approach.</div>
<div dir="ltr">Cost to dereference a struct member is probably a little more than just using or getting a value. It's possible it'll be cached, though.</div>
<div>On Oct 2, 2015 5:26 PM, "Jonathan Wilkes via Pd-list" <<a rel="nofollow" shape="rect" href="mailto:pd-list@lists.iem.at" target="_blank">pd-list@lists.iem.at</a>> wrote:<br clear="none"><blockquote style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div><div style="color:#000;background-color:#fff;font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"><div>There are probably a lot more ways to implement ramps. For example, you</div><div dir="ltr">could increment only at block boundaries and just repeat that value for the</div><div dir="ltr">rest of the block. That would looks a lot like Supercollider's "kr" ugens. (I</div><div dir="ltr">actually thought that's how [line~] worked until I looked at the code.)</div><div dir="ltr"><br clear="none"></div><div dir="ltr">Btw-- does it cost anything significant to dereference x->x_inc inside the</div><div dir="ltr">while loop of line_tilde_perform? Or is the compiler able to somehow</div><div dir="ltr">optimize that?</div><div dir="ltr"><br clear="none"></div><div dir="ltr">-Jonathan<br clear="none"></div><div><span></span></div> <br clear="none"><div><br clear="none"><br clear="none"></div><div style="display:block"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div style="font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:16px"> <div dir="ltr"> <font face="Arial" size="2"> On Friday, October 2, 2015 11:36 AM, i go bananas <<a rel="nofollow" shape="rect" href="mailto:hard.off@gmail.com" target="_blank">hard.off@gmail.com</a>> wrote:<br clear="none"> </font> </div> <br clear="none"><br clear="none"> <div><div><div>Hi, me again. <div><br clear="none"></div><div>Thanks for the discussion. It has really opened my eyes. </div><div><br clear="none"></div><div>So, i got my naive c++ implementation of line~ basically working. </div><div><br clear="none"></div><div>And of course, just running a for loop incrementing by ticks, i run into the exact precision error that this block quantizing seems to avoid. My line from 0 to 100 over 44100 samples only gets to 99.93 </div><div><br clear="none"></div><div>So, i also need to add something like pd's block quantization to make sure my line goes all the way to the specified value. </div><div><br clear="none"></div><div>My questions then are 2: </div><div><br clear="none"></div><div>Is pd's method the way i should do it? Or is there a better alternative? </div><div><br clear="none"></div><div>And, if i do it the pd way, how does that work? Does the increment get updated every block? Or is it just the last block that is stretched? </div></div></div><br clear="none"><br clear="none"></div> </div> </div> </div></div></div></div><br clear="none">_______________________________________________<br clear="none">
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