[PD] fexpr~ block limitations - bug

[Shahrokh Yadegari]

Hi Alexandre,

I recall that I fixed this bug a while back so I am surprised that I see it
again.

In any case your email is timely as I just started looking at the bugs and
hope to be submitting new sources soon.

Would you care to be my alpha tester? If so, what environment are you on?
(mac, linux, sorry I cannot deal with windows)

cheers,
Shahrokh


On Tue, Sep 8, 2015 at 1:12 PM, Alexandre Torres Porres <porres at gmail.com>
wrote:

> So, as it seems, I just found that there's an issue with the way [fexpr~]
> abbreviates the formulas and the way it behaves.
>
> If you use it like this [fexpr~ ($x + $x[-1] + $x[-2] + $x[-3]) * 0.25] by
> supressing the outlet number, it won't check back on previous block sample
> values.
>
> but if you do this [fexpr~ ($x1 + $x1[-1] + $x1[-2] + $x1[-3]) * 0.25] it
> will!
>
> check attached patch
>
> Anyway, still seems like a bug to me one way or another that needs to be
> fixed. And, as long as we're on the subject, how's the work on the previous
> bug reports?
>
> Thanks
>
> 2015-09-08 1:47 GMT-03:00 Alexandre Torres Porres <porres at gmail.com>:
>
>> Hi Shahrokh and Pd list
>>
>> I've been testing fexpr~ and it seems it won't get the previous samples
>> from the previous block.
>>
>> For example, a simple mean filter like this:
>>
>> [fexpr~ ($x + $x[-1]) * 0.5]
>>
>> will not work for the first sample of the block, because it won't get the
>> last sample from the previous block.
>>
>> So, I know that in practice it doesn't compromise much, it's just one
>> sample, but in an 16 point average filter this becomes more of a concern.
>> One way or another, even for just one sample, I consider this problematic
>> and a bug, as it should always be able to address previous samples.
>>
>> Am I right?
>>
>> thanks
>>
>
>


-- 
Shahrokh Yadegari
Professor of Composition and Sound Design,
Theatre and Dance Department
University of California, San Diego
Director, Initiative for Digital Exploration of Arts and Science, (IDEAS)
California Institute for Telecommunications and Information Technologies
(Calit2)
Email: sdy at ucsd.edu
Web: http://yadegari.org
Tel: (858) 822-4113
Fax: (858) 534-1080
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