7 objects arpeggiator note that if you click the same Hradio box several times you also get variations. gr, Tim
2011/10/11 Mathieu Bouchard <ma...@artengine.ca> > Le 2011-10-12 à 01:32:00, hardoff goes bananas a écrit : > > > no idea what causes the transpose/chord shift in this patch, but if you >> leave it for a while, it inevitably does happen. >> > > You are greatly amplifying error accumulation coming from [phasor~]. With a > samplerate of exactly 44100 and a frequency of exactly 2, an ideal [phasor~] > would increase by an amount of 2/44100 at each sample, leading to a new 0 at > every 22050. The truth is a bit different. > > If you do it with regular pd floats (float32), the amount 2/44100 gets > computed as 12466118/pow(2,15+23) instead, because that's the closest > fraction that this format can express. > > For reasons of error accumulation, [phasor~] uses a «double» (float64) for > storing the phase, but then it stores 1/44100 as a float, an computes > 2*(1/44100) as a float too, therefore a [phasor~ 2] doesn't have the exact > frequency of 2. > > BTW, have you tried [phasor~ 2.01] and other things like that ? At least on > my computer, it's more interesting than [phasor~ 2]. > > > ______________________________**______________________________** > __________ > | Mathieu BOUCHARD ----- téléphone : +1.514.383.3801 ----- Montréal, QC > > _______________________________________________ > Pd-list@iem.at mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >
#N canvas 20 61 515 240 10; #X obj 50 97 samphold~; #X obj 50 165 dac~; #X obj 51 142 osc~; #X obj 51 53 phasor~ 2; #X obj 51 31 hradio 15 1 0 13 empty empty empty 0 -8 0 10 -262144 -1 -1 11; #X obj 102 73 phasor~ 12; #X obj 51 119 expr~ (1+$v1)*200*(1-$v2)*cos((1-$v2)*(20+(200*$v1))) ; #X connect 0 0 6 0; #X connect 2 0 1 0; #X connect 2 0 1 1; #X connect 3 0 0 0; #X connect 4 0 3 0; #X connect 4 0 3 1; #X connect 5 0 0 1; #X connect 5 0 6 1; #X connect 6 0 2 0;
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