[PD] vline~ precision under lower block sizes

Roman Haefeli reduzent at gmail.com
Mon Nov 5 14:09:05 CET 2012

Hi João

I can't add more info to this issue, but to me it looks like bug. It
seems in re-blocked (< 64?) subpatches the ramp starts too early. But
why this happens, I don't have the slightest idea.

I think, you provided enough info to file a  bug report.


On Sun, 2012-11-04 at 17:27 +0100, João Pais wrote:
> (according to the pd-list server this message came attached to thread of  
> another mail, I try to send it here again to create a new thread)
> Hello,
> a friend noticed that vline~ behaves differently with different block  
> sizes - namely that the smaller the block size is, the less precision it  
> has. Besides the numbers being different with each block size, the latest  
> values go slightly over the border of the desired range.
> Is this a bug, a feature, or an unavoidable behavior of the vline~  
> algorithms?
> Attached is a patch which explains the situation. I think it should be  
> clearly enough explained.
> The bottom line is: in the patch I am working, block size is 1 (sample  
> rate 48KHz, in case it matters). Which choices are there to improve  
> vline~'s precision, so that I get the results I am expecting?
> Thanks,
> João
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