My guess s3is that the q105 is a true slew limiter but that whoever's selling it on that page misunderstood what it does. Here's one reliable source:
https://en.wikipedia.org/wiki/Slew_rate (note "Musical Applications" section at bottom.) cheers Miller On Tue, Jul 23, 2019 at 11:41:11AM -0300, Alexandre Torres Porres wrote: > oh, found the module that led me to assume all that I had assumed :) > > https://synthesizers.com/q105.html > > Em seg, 22 de jul de 2019 ??s 23:39, Alexandre Torres Porres < > [email protected]> escreveu: > > > > > Hi, I'm having some fun with the new (and yet to come) slop~ object, which > > should be in Pd Vanilla in the next release and is already included in the > > source code. > > > > I'm going ahead and I'm also including it in my live electronics tutorial. > > I already have examples on how to use it for a signal linear (with 3rd and > > 5th inlet) and exponential (with 4rd and 6th inlet) portamento, see => > > https://github.com/porres/Live-Electronic-Music-Tutorial/blob/master/Tutorial/Vol.1/Part.01-Basic.Audio/04-Gain.Adjustment/5.Signal.smoothening.%5Bslop~%5D.pd > > > > I was also able to implement a cool non linear envelope with [vline~] + > > [slop~] > > https://github.com/porres/Live-Electronic-Music-Tutorial/blob/master/Tutorial/Vol.1/Part.03-Control/15-Envelopes/2.Classic.Types/6.%5Bvline~%5D.%5Bslop~%5D.pd > > > > Now for some questionings; > > > > So, [slop~] generates linear ramps and also, as a one pole filter, it > > generates non linear ramps. Anyway, I've seen the term 'slew' being used in > > synth modules as a portamento generator and then I was assuming, for some > > reason, it should be like this one pole filter, so I have a [slew~] object > > in the else library that does that kind of lowpass filtering (see: > > https://github.com/porres/pd-else/blob/master/Classes/Source/slew~.c ) > > > > slew~ takes an input in ms, which is the period of the portamento, and one > > could also use something like [rpole~] and convert the ms value to the > > coefficient with the formula coef = exp(ln(0.001) / (ms/1000 * samplerate)) > > - and I got this formula from the documentation of some object I don't > > remember from SuperCollider.. > > > > Anyway, what I ask is if that object name makes sense. The [slop~] object > > makes me think it's ok, but by looking at it, it seems that a so called > > 'slew rate limiter' always seems to generate linear ramps, so maybe all so > > called 'slew' modules only generate linear ramps and calling my object > > "slew~" can be inappropriate. > > > > What do you say? > > > > thanks > > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > https://lists.puredata.info/listinfo/pd-list _______________________________________________ [email protected] mailing list UNSUBSCRIBE and account-management -> https://lists.puredata.info/listinfo/pd-list
