Hi Frank, > Parabolic being not so useful? I'd say it's as useful as a triangle, though > that's not saying much.
Not sure if that question is to me—I don’t think I said that, just more more difficult for not much gain (as you say, as useful as a triangle), in the context of a basic analog synth. > OK, you say it's easy to make straight lines from a few components. What of > the morph from saw to tri, alternating one segment at a rising angle with > another at a falling angle? That's all straight lines, and it seems > phenomenally useful. It’s been a long time since my synth-hardware days, and I never tried a saw-tri morph, I’m sure someone else can support more. There are a number of ways to generate a triangle, either as the root waveform or derived. For instance, you can derive it from saw by switching between a rising ramp, and an inverted (falling ramp) version of it, by using a comparator set to half-way. Controlling the symmetry, for morphing upramp-tri-downramp is a little trickier, as you’d either need to juggle two ramp rates, or amplitude multipliers (that seems much easier). Just off the top of my head. Nigel > On Feb 12, 2018, at 3:41 AM, Frank Sheeran <fshee...@gmail.com> wrote: > > Nigel thanks for your insight on why hardware never (or rarely?) had a > parabolic wave output. In a phrase, too many components. > > Parabolic being not so useful? I'd say it's as useful as a triangle, though > that's not saying much. > > OK, you say it's easy to make straight lines from a few components. What of > the morph from saw to tri, alternating one segment at a rising angle with > another at a falling angle? That's all straight lines, and it seems > phenomenally useful. > > (This video is a non-BWL oscillator though my BWL oscillator does the same > tri-saw morph, if not all of the other ones shown.) > > https://www.youtube.com/watch?v=eDUkqtdgcXg > <https://www.youtube.com/watch?v=eDUkqtdgcXg> > > _______________________________________________ > dupswapdrop: music-dsp mailing list > music-dsp@music.columbia.edu > https://lists.columbia.edu/mailman/listinfo/music-dsp
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