[PD] slop~ (new object for 0.50) and the "slew" term

[Alexandre Torres Porres]

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
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