[PD] [cos~]replacement for webPd patch

Mon Aug 24 17:30:18 CEST 2015

Jonathan's right,

In Pd (vanilla 0.46-4 at least) both [cos~] and [osc~] use the same cos
lookup table. Only [osc~] is a signal generator, and [cos~] the raw
'lookup'. Therefore there shouldn't be any difference between [phasor~] ->
[cos~] and [osc~] if the phase is equal.

Check the attached patch, I can't hear any difference when toggling between
the two.

@Seb, would it be possible for you to implement [abs~] and [wrap~]?

Cheers,
Joe

On 24 August 2015 at 15:32, Jonathan Wilkes via Pd-list <
pd-list at lists.iem.at> wrote:

> Clarification: when I say you can't substitute "one" for the other, I mean
> trying to substitute [osc~] for [cos~].
>
>
>
>
> On Monday, August 24, 2015 10:29 AM, Jonathan Wilkes <jancsika at yahoo.com>
> wrote:
>
>
> From what I recall
>
> [osc~]
>
> is the same as
>
> [phasor~]
> |
> [cos~]
>
> So while there may be some trivial instances where you can substitute one
> for the other, generally you can't.  For example-- imagine having some more
> tilde objects between the [phasor~] and the [cos~] above.  In that case you
> cannot get the same signal using [osc~].  (Or at least it's not obvious to
> me how one would do that.)
>
> Furthermore, the right inlet of [osc~] is a control inlet, while the inlet
> for [cos~] is a signal inlet.
>
> Most of this info should be in the help patches.  (At least the ones I
> made for Pd Extended.)
>
> -Jonathan
>
>
>
> On Monday, August 24, 2015 10:19 AM, Julian Brooks <jbeezez at gmail.com>
> wrote:
>
>
> Hey Seb,
>
> Good to hear from you...
>
> Does [osc~] take arguments? In my test when I gave the patch an [osc~ 0] I
> got an error in the console saying '0' not understood and I presumed that
> was my argument being spat back.
>
> I can't really explain why it doesn't sound right to be honest, this is
> why I'm here asking:).
>
> I need to do some more coding and get back to you on that one.
>
> Regards,
>
> Julian
>
>
>
> On 24 August 2015 at 15:10, s p <sebpiq at gmail.com> wrote:
>
> Hi Julian,
>
> I've never used [cos~], can you explain to me why an [osc~] with the
> correct phase cannot do the trick?
>
> Cheers
>
> On Mon, Aug 24, 2015 at 5:03 PM, Julian Brooks <jbeezez at gmail.com> wrote:
>
> Some good stuff here, thanks people.
>
> [osc~] doesn't appear to take arguments so that's out.
> I don't doubt Alexandre's ears or thoroughness but in this instance,when
> replacing [cos~] with [osc~] there's a big difference in the sound.
> Alexandros - thanks for the sketch, yes it does make sense, webpd has no
> [until] or [cos].
> Joe- nice implementation, again unfortunately there's no [abs~] or [wrap~].
>
> What I do think from the hints and suggestions given is that I've got
> enough to be getting on with to make something approximately close and
> hopefully interesting.
>
> Thanks all for suggestions so far,
>
> Julian
>
> On 24 August 2015 at 10:30, Joe White <white.joe4 at gmail.com> wrote:
>
> Hi Julian,
>
> I've attached an optimised implementation for [cos~] that we've been using
> for Heavy. It's an approximate taylor series expansion but it should be
> much faster than just using cosf(). Hopefully webpd supports [abs~] and
> [wrap~].
>
> Cheers,
> Joe
>
> On 24 August 2015 at 09:18, Alexandros Drymonitis <adrcki at gmail.com>
> wrote:
>
> what about this?
>
> [table_size(
> |
> [until]
> |
> [f]x[+ 1]
> |
> [t f f]__________
> |                         |
> [/ table_size]      |
> |                         |
> [* twoPi]             |
> |                         |
> [cos]                  |
> |                         |
> [tabwrite table name]
>
>
> well, ASCII patches don't look so good, but I hope you get the picture.
>
> On Mon, Aug 24, 2015 at 9:29 AM, Alexandre Torres Porres <porres at gmail.com
> > wrote:
>
> cause I made some tests, [osc~] will give the same result as [cos~]...
>
> 2015-08-24 3:26 GMT-03:00 Alexandre Torres Porres <porres at gmail.com>:
>
> > Unfortunately [osc~] doesn't have the tonal quality I'm after
>
> how is that?
>
> 2015-08-23 17:35 GMT-03:00 Julian Brooks <jbeezez at gmail.com>:
>
> Alexandre & Alexandros,
>
> Cheers for pitching in.
>
> It's for a random bleepy patch.
> Unfortunately [osc~] doesn't have the tonal quality I'm after - good idea
> though.
>
> On 23 August 2015 at 20:53, Alexandre Torres Porres <porres at gmail.com>
> wrote:
>
> i do realize that, but who knows what he needs this for, it may work... :)
>
> 2015-08-23 16:37 GMT-03:00 Alexandros Drymonitis <adrcki at gmail.com>:
>
>
>
> On Sun, Aug 23, 2015 at 8:04 PM, Alexandre Torres Porres <porres at gmail.com
> > wrote:
>
> you can treat [osc~] as [cos~]
>
> just give it a frequency of "0" and use the phase inlet as the angle input
> (from 0 to 1).
>
> But the phase inlet of [osc~] is a control inlet, and [cos~] takes
> signals..
>
>
>
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> --
>
> *Sébastien Piquemal*
>
>  -----* @sebpiq*
>  ----- http://github.com/sebpiq
>  ----- http://funktion.fm
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