[PD] line: grain rate and delta

[tim vets]

2010/10/21 IOhannes zmölnig <zmoelnig at iem.at>

> On 10/21/2010 03:30 PM, tim vets wrote:
> > Hi all,
> > I'm a bit confused about the grain rate of [line]
> > the help says that 'the default grain rate is 20 ms'
> > however, when I connect a [delta] to a [line], it shows zero's,
> > while inserting a [speedlim 20] changes that.
> > also some other tests in attached patch.
> > can someone explain ?
>
> as matju already stated, [delta] is something, a lot of people
> (including me) do not know.
>
> assuming it is the same as:
> |
> [t b b]
> |     |
> [timer]
> |
>
> then it "looks" like you get "0", whereas in reality you get:
> [20, 0( [*]
>
> the "20" shows up so incredibly short (and is then overwritten by "0",
> that you simply cannot see it.
> [print] usually allows you to track such things, as you not only see the
> last value, but the entire history.
>
> [*] why?
> when [line] receives a new target, it will immediately send out the
> start value, and then (in grain-time ms) the next value until it reaches
> the target value.
> in your case this translates to:
> - you generate the first number ("7") and send [7 20( to [line]
> - line will immediately output the current value ("0") and after 20ms it
> will output the next value ("7")
> - at the "same" time, you generate a new value ("9"), and send this to
> [line], which will immediately output the current value ("7").
>
> since both the start value and the target value are output at the same
> logical time, [timer] caluculates a time-difference of "0", which will
> be visible for the next 20ms.
>
>

the way I understood it, [delta] is the equivalent of:
[image: delta.png]
I also don't know where I got [delta] from, it doesn't seem to have a help
patch associated with it.
anyways, replacing [delta] with the above gives the same result.
but I'm starting to see why...
Tim



> gmadr
> IOhannes
>
>
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