As long as we're going off the rails... This provoked me into learning something new: https://stackoverflow.com/questions/24177503/how-does-the-c-preprocessor-handle-circular-dependencies
So interestingly those two #define's together would have no effect! -Ethan On Thu, Mar 19, 2020 at 7:34 AM STEFFAN DIEDRICHSEN <sdiedrich...@me.com> wrote: > #define analog digital > #define digital analog > > and now read again …. > > > Best, > > Steffan > > > > On 19.03.2020|KW12, at 12:31, Theo Verelst <theo...@telfort.nl> wrote: > > > > Maybe a side remark, interesting nevertheless: the filtering in digital > domain, as > > compared with the analog good ol' electronics filters isn't the same in > any of the > > important interpretations of sampled signals being put on any regular > digital to > > analog converter, by and large regardless of the sampled data and it's > known properties > > offered to the digital filter. > > > > So, reconstructing the digital simulation of an analog filter into a > electronic > > signal through either a (theoretically , or near-) perfect > reconstruction DAC or an > > ordinary DAC with any of the widely used limited-time interval over > sampled FIR or IIR > > simplified "reconstruction" filters, isn't going to yield a perfect > equivalent of a > > normal, phase shift based electronics (or mechanics based) filter. Maybe > unfortunately, > > but it's only an approximation, and no theoretically pleasing sounding > mathematical > > derivation of filter properties is going to change that. > > > > It is possible to construct digital signals, where givens are hard-known > about the signal > > which given a certain DAC will 'reconstruct' or simply result in an > output signal which > > approaches a certain engineered ideal to any degree of accuracy. In > general though, the > > signal between samples can only be known through perfect reconstruction > filtering > > (taking infinite time and resources), and DACs that are used in studio > and consumer > > equipment should be thoroughly signal prepared by pre-conditioning the > digital signal > > feeding it such that it's very limited reconstruction filtering is used > such that certain > > output signal ideals are approximated to the required degree of accuracy. > > > > Including even a modest filter in that picture isn't easy! > > > > Theo V. > > _______________________________________________ > > dupswapdrop: music-dsp mailing list > > music-dsp@music.columbia.edu > > https://lists.columbia.edu/mailman/listinfo/music-dsp > > > > _______________________________________________ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp
_______________________________________________ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.columbia.edu/mailman/listinfo/music-dsp
