Subject: Re: [linux-audio-dev] Dithering idiots
From: Dave Griffiths (dave_AT_pawfal.org)
Date: Mon Jun 17 2002 - 14:16:14 EEST
> Paul Davis wrote:
>
> > i don't quite get it. when you render a waveform on the screen, you're
> > normally not doing anything like interpolation. you're subsampling the
> > amplitude waveform to a given frames-per-pixel density.
>
> But what if (as Bill says) a peak falls initially between the graphical
> sample points and then when you change the graphical resolution and resample
> it suddenly appears? Ok, this would probably only occur for some potentially
> very steep transients but surely peaks could get missed? When your graphical
> resolution is lower than your sample resolution (which, let's face
> it is going to be true always) then how should you interpret the
> underlying envelope?
Yep, the PoshSampler SSM plugin suffers from this also, it's really just the
same problem as audio sampling, I tried a few quick fixes, but doing proper
antialiasing should sort it out.
Dave
: www.pawfal.org :
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